diff --git a/adig.c b/adig.c
index 031ce815..66b64a4a 100644
--- a/adig.c
+++ b/adig.c
@@ -17,26 +17,35 @@
 
 #include "setup.h"
 
-#if defined(WIN32) && !defined(WATT32)
-#include "nameser.h"
+#ifdef HAVE_SYS_SOCKET_H
+#  include <sys/socket.h>
+#endif
+#ifdef HAVE_NETINET_IN_H
+#  include <netinet/in.h>
+#endif
+#ifdef HAVE_ARPA_INET_H
+#  include <arpa/inet.h>
+#endif
+#ifdef HAVE_NETDB_H
+#  include <netdb.h>
+#endif
+#ifdef HAVE_ARPA_NAMESER_H
+#  include <arpa/nameser.h>
 #else
-#ifdef HAVE_SYS_TIME_H
-#include <sys/time.h>
+#  include "nameser.h"
 #endif
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <arpa/nameser.h>
 #ifdef HAVE_ARPA_NAMESER_COMPAT_H
-#include <arpa/nameser_compat.h>
+#  include <arpa/nameser_compat.h>
 #endif
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
+
+#ifdef HAVE_SYS_TIME_H
+#  include <sys/time.h>
 #endif
-#include <netdb.h>
+#ifdef HAVE_UNISTD_H
+#  include <unistd.h>
 #endif
 #ifdef HAVE_STRINGS_H
-#include <strings.h>
+#  include <strings.h>
 #endif
 
 #include <stdio.h>
diff --git a/ares_expand_name.c b/ares_expand_name.c
index 9c05546d..dc5b1075 100644
--- a/ares_expand_name.c
+++ b/ares_expand_name.c
@@ -17,18 +17,16 @@
 
 #include "setup.h"
 
-#if defined(WIN32) && !defined(WATT32)
-#include "nameser.h"
-#else
 #ifdef HAVE_NETINET_IN_H
-#include <netinet/in.h>
+#  include <netinet/in.h>
 #endif
 #ifdef HAVE_ARPA_NAMESER_H
-#include <arpa/nameser.h>
+#  include <arpa/nameser.h>
+#else
+#  include "nameser.h"
 #endif
 #ifdef HAVE_ARPA_NAMESER_COMPAT_H
-#include <arpa/nameser_compat.h>
-#endif
+#  include <arpa/nameser_compat.h>
 #endif
 
 #include <stdlib.h>
diff --git a/ares_expand_string.c b/ares_expand_string.c
index 5a3ae182..ead60a40 100644
--- a/ares_expand_string.c
+++ b/ares_expand_string.c
@@ -17,15 +17,13 @@
 
 #include "setup.h"
 
-#if defined(WIN32) && !defined(WATT32)
-#include "nameser.h"
-#else
 #ifdef HAVE_NETINET_IN_H
-#include <netinet/in.h>
+#  include <netinet/in.h>
 #endif
 #ifdef HAVE_ARPA_NAMESER_H
-#include <arpa/nameser.h>
-#endif
+#  include <arpa/nameser.h>
+#else
+#  include "nameser.h"
 #endif
 
 #include <string.h>
diff --git a/ares_gethostbyaddr.c b/ares_gethostbyaddr.c
index 1274d5ac..85e2e39f 100644
--- a/ares_gethostbyaddr.c
+++ b/ares_gethostbyaddr.c
@@ -16,27 +16,25 @@
  */
 #include "setup.h"
 
-#if defined(WIN32) && !defined(WATT32)
-#include "nameser.h"
-#else
 #ifdef HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
+#  include <sys/socket.h>
 #endif
 #ifdef HAVE_NETINET_IN_H
-#include <netinet/in.h>
+#  include <netinet/in.h>
 #endif
 #ifdef HAVE_NETDB_H
-#include <netdb.h>
+#  include <netdb.h>
 #endif
 #ifdef HAVE_ARPA_INET_H
-#include <arpa/inet.h>
+#  include <arpa/inet.h>
 #endif
 #ifdef HAVE_ARPA_NAMESER_H
-#include <arpa/nameser.h>
+#  include <arpa/nameser.h>
+#else
+#  include "nameser.h"
 #endif
 #ifdef HAVE_ARPA_NAMESER_COMPAT_H
-#include <arpa/nameser_compat.h>
-#endif
+#  include <arpa/nameser_compat.h>
 #endif
 
 #include <stdio.h>
diff --git a/ares_gethostbyname.c b/ares_gethostbyname.c
index 3048bb25..a32da8f6 100644
--- a/ares_gethostbyname.c
+++ b/ares_gethostbyname.c
@@ -17,30 +17,25 @@
 
 #include "setup.h"
 
-#if defined(WIN32) && !defined(WATT32)
-#include "nameser.h"
-#else
 #ifdef HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
+#  include <sys/socket.h>
 #endif
 #ifdef HAVE_NETINET_IN_H
-#include <netinet/in.h>
+#  include <netinet/in.h>
 #endif
 #ifdef HAVE_NETDB_H
-#include <netdb.h>
+#  include <netdb.h>
 #endif
 #ifdef HAVE_ARPA_INET_H
-#include <arpa/inet.h>
-#endif
-#ifdef HAVE_ARPA_NAMESER_H
-#include <arpa/nameser.h>
+#  include <arpa/inet.h>
 #endif
 #ifdef HAVE_ARPA_NAMESER_H
-#include <arpa/nameser.h>
+#  include <arpa/nameser.h>
+#else
+#  include "nameser.h"
 #endif
 #ifdef HAVE_ARPA_NAMESER_COMPAT_H
-#include <arpa/nameser_compat.h>
-#endif
+#  include <arpa/nameser_compat.h>
 #endif
 
 #include <stdio.h>
diff --git a/ares_getnameinfo.c b/ares_getnameinfo.c
index 8a6d4811..99d3b87d 100644
--- a/ares_getnameinfo.c
+++ b/ares_getnameinfo.c
@@ -16,27 +16,25 @@
  */
 #include "setup.h"
 
-#if defined(WIN32) && !defined(WATT32)
-#include "nameser.h"
-#else
 #ifdef HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
+#  include <sys/socket.h>
 #endif
 #ifdef HAVE_NETINET_IN_H
-#include <netinet/in.h>
+#  include <netinet/in.h>
 #endif
 #ifdef HAVE_NETDB_H
-#include <netdb.h>
+#  include <netdb.h>
 #endif
 #ifdef HAVE_ARPA_INET_H
-#include <arpa/inet.h>
+#  include <arpa/inet.h>
 #endif
 #ifdef HAVE_ARPA_NAMESER_H
-#include <arpa/nameser.h>
+#  include <arpa/nameser.h>
+#else
+#  include "nameser.h"
 #endif
 #ifdef HAVE_ARPA_NAMESER_COMPAT_H
-#include <arpa/nameser_compat.h>
-#endif
+#  include <arpa/nameser_compat.h>
 #endif
 
 #ifdef HAVE_NET_IF_H
diff --git a/ares_init.c b/ares_init.c
index d4e15052..4d4ba1ea 100644
--- a/ares_init.c
+++ b/ares_init.c
@@ -19,11 +19,10 @@
 #include "setup.h"
 
 #if defined(WIN32) && !defined(WATT32)
-#include "nameser.h"
 #include <iphlpapi.h>
 #include <malloc.h>
+#endif
 
-#else
 #ifdef HAVE_SYS_PARAM_H
 #include <sys/param.h>
 #endif
@@ -49,16 +48,17 @@
 #endif
 
 #ifdef HAVE_ARPA_NAMESER_H
-#include <arpa/nameser.h>
+#  include <arpa/nameser.h>
+#else
+#  include "nameser.h"
 #endif
-
 #ifdef HAVE_ARPA_NAMESER_COMPAT_H
-#include <arpa/nameser_compat.h>
+#  include <arpa/nameser_compat.h>
 #endif
+
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>
 #endif
-#endif
 
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/ares_mkquery.c b/ares_mkquery.c
index 739e235b..a9c9187f 100644
--- a/ares_mkquery.c
+++ b/ares_mkquery.c
@@ -17,18 +17,16 @@
 
 #include "setup.h"
 
-#if defined(WIN32) && !defined(WATT32)
-#include "nameser.h"
-#else
 #ifdef HAVE_NETINET_IN_H
-#include <netinet/in.h>
+#  include <netinet/in.h>
 #endif
 #ifdef HAVE_ARPA_NAMESER_H
-#include <arpa/nameser.h>
+#  include <arpa/nameser.h>
+#else
+#  include "nameser.h"
 #endif
 #ifdef HAVE_ARPA_NAMESER_COMPAT_H
-#include <arpa/nameser_compat.h>
-#endif
+#  include <arpa/nameser_compat.h>
 #endif
 
 #include <stdlib.h>
diff --git a/ares_parse_a_reply.c b/ares_parse_a_reply.c
index 85af9964..6380f5ba 100644
--- a/ares_parse_a_reply.c
+++ b/ares_parse_a_reply.c
@@ -17,30 +17,29 @@
 
 #include "setup.h"
 
-#if defined(WIN32) && !defined(WATT32)
-#include "nameser.h"
-#else
 #ifdef HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
+#  include <sys/socket.h>
 #endif
 #ifdef HAVE_NETINET_IN_H
-#include <netinet/in.h>
+#  include <netinet/in.h>
 #endif
 #ifdef HAVE_NETDB_H
-#include <netdb.h>
+#  include <netdb.h>
 #endif
 #ifdef HAVE_ARPA_INET_H
-#include <arpa/inet.h>
+#  include <arpa/inet.h>
 #endif
 #ifdef HAVE_ARPA_NAMESER_H
-#include <arpa/nameser.h>
+#  include <arpa/nameser.h>
+#else
+#  include "nameser.h"
 #endif
 #ifdef HAVE_ARPA_NAMESER_COMPAT_H
-#include <arpa/nameser_compat.h>
-#endif
+#  include <arpa/nameser_compat.h>
 #endif
+
 #ifdef HAVE_STRINGS_H
-#include <strings.h>
+#  include <strings.h>
 #endif
 
 #include <stdlib.h>
diff --git a/ares_parse_aaaa_reply.c b/ares_parse_aaaa_reply.c
index 812694eb..6a43f933 100644
--- a/ares_parse_aaaa_reply.c
+++ b/ares_parse_aaaa_reply.c
@@ -17,30 +17,29 @@
 
 #include "setup.h"
 
-#if defined(WIN32) && !defined(WATT32)
-#include "nameser.h"
-#else
 #ifdef HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
+#  include <sys/socket.h>
 #endif
 #ifdef HAVE_NETINET_IN_H
-#include <netinet/in.h>
+#  include <netinet/in.h>
 #endif
 #ifdef HAVE_NETDB_H
-#include <netdb.h>
+#  include <netdb.h>
 #endif
 #ifdef HAVE_ARPA_INET_H
-#include <arpa/inet.h>
+#  include <arpa/inet.h>
 #endif
 #ifdef HAVE_ARPA_NAMESER_H
-#include <arpa/nameser.h>
+#  include <arpa/nameser.h>
+#else
+#  include "nameser.h"
 #endif
 #ifdef HAVE_ARPA_NAMESER_COMPAT_H
-#include <arpa/nameser_compat.h>
-#endif
+#  include <arpa/nameser_compat.h>
 #endif
+
 #ifdef HAVE_STRINGS_H
-#include <strings.h>
+#  include <strings.h>
 #endif
 
 #include <stdlib.h>
diff --git a/ares_parse_ns_reply.c b/ares_parse_ns_reply.c
index e3a89abb..9eed3ebe 100644
--- a/ares_parse_ns_reply.c
+++ b/ares_parse_ns_reply.c
@@ -20,27 +20,25 @@
 
 #include "setup.h"
 
-#if defined(WIN32) && !defined(WATT32)
-#include "nameser.h"
-#else
 #ifdef HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
+#  include <sys/socket.h>
 #endif
 #ifdef HAVE_NETINET_IN_H
-#include <netinet/in.h>
+#  include <netinet/in.h>
 #endif
 #ifdef HAVE_NETDB_H
-#include <netdb.h>
+#  include <netdb.h>
 #endif
 #ifdef HAVE_ARPA_INET_H
-#include <arpa/inet.h>
+#  include <arpa/inet.h>
 #endif
 #ifdef HAVE_ARPA_NAMESER_H
-#include <arpa/nameser.h>
+#  include <arpa/nameser.h>
+#else
+#  include "nameser.h"
 #endif
 #ifdef HAVE_ARPA_NAMESER_COMPAT_H
-#include <arpa/nameser_compat.h>
-#endif
+#  include <arpa/nameser_compat.h>
 #endif
 
 #include <stdlib.h>
diff --git a/ares_parse_ptr_reply.c b/ares_parse_ptr_reply.c
index 4905e845..13ff6521 100644
--- a/ares_parse_ptr_reply.c
+++ b/ares_parse_ptr_reply.c
@@ -17,27 +17,26 @@
 
 #include "setup.h"
 
-#if defined(WIN32) && !defined(WATT32)
-#include "nameser.h"
-#else
 #ifdef HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
+#  include <sys/socket.h>
 #endif
 #ifdef HAVE_NETINET_IN_H
-#include <netinet/in.h>
+#  include <netinet/in.h>
 #endif
 #ifdef HAVE_NETDB_H
-#include <netdb.h>
+#  include <netdb.h>
 #endif
 #ifdef HAVE_ARPA_NAMESER_H
-#include <arpa/nameser.h>
+#  include <arpa/nameser.h>
+#else
+#  include "nameser.h"
 #endif
 #ifdef HAVE_ARPA_NAMESER_COMPAT_H
-#include <arpa/nameser_compat.h>
-#endif
+#  include <arpa/nameser_compat.h>
 #endif
+
 #ifdef HAVE_STRINGS_H
-#include <strings.h>
+#  include <strings.h>
 #endif
 
 #include <stdlib.h>
diff --git a/ares_process.c b/ares_process.c
index 824640ea..798df7a2 100644
--- a/ares_process.c
+++ b/ares_process.c
@@ -18,47 +18,45 @@
 
 #include "setup.h"
 
-#if defined(WIN32) && !defined(WATT32)
-#include "nameser.h"
-
-#else
 #ifdef HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
+#  include <sys/socket.h>
 #endif
 #ifdef HAVE_SYS_UIO_H
-#include <sys/uio.h>
+#  include <sys/uio.h>
 #endif
 #ifdef HAVE_NETINET_IN_H
-#include <netinet/in.h> /* <netinet/tcp.h> may need it */
+#  include <netinet/in.h>
 #endif
 #ifdef HAVE_NETINET_TCP_H
-#include <netinet/tcp.h> /* for TCP_NODELAY */
+#  include <netinet/tcp.h>
 #endif
 #ifdef HAVE_NETDB_H
-#include <netdb.h>
+#  include <netdb.h>
 #endif
 #ifdef HAVE_ARPA_NAMESER_H
-#include <arpa/nameser.h>
+#  include <arpa/nameser.h>
+#else
+#  include "nameser.h"
 #endif
 #ifdef HAVE_ARPA_NAMESER_COMPAT_H
-#include <arpa/nameser_compat.h>
+#  include <arpa/nameser_compat.h>
 #endif
+
 #ifdef HAVE_SYS_TIME_H
-#include <sys/time.h>
+#  include <sys/time.h>
 #endif
-#endif /* WIN32 && !WATT32 */
 
 #ifdef HAVE_STRINGS_H
-#include <strings.h>
+#  include <strings.h>
 #endif
 #ifdef HAVE_UNISTD_H
-#include <unistd.h>
+#  include <unistd.h>
 #endif
 #ifdef HAVE_SYS_IOCTL_H
-#include <sys/ioctl.h>
+#  include <sys/ioctl.h>
 #endif
 #ifdef NETWARE
-#include <sys/filio.h>
+#  include <sys/filio.h>
 #endif
 
 #include <assert.h>
diff --git a/ares_query.c b/ares_query.c
index cc3b63af..25824593 100644
--- a/ares_query.c
+++ b/ares_query.c
@@ -17,18 +17,16 @@
 
 #include "setup.h"
 
-#if defined(WIN32) && !defined(WATT32)
-#include "nameser.h"
-#else
 #ifdef HAVE_NETINET_IN_H
-#include <netinet/in.h>
+#  include <netinet/in.h>
 #endif
 #ifdef HAVE_ARPA_NAMESER_H
-#include <arpa/nameser.h>
+#  include <arpa/nameser.h>
+#else
+#  include "nameser.h"
 #endif
 #ifdef HAVE_ARPA_NAMESER_COMPAT_H
-#include <arpa/nameser_compat.h>
-#endif
+#  include <arpa/nameser_compat.h>
 #endif
 
 #include <stdlib.h>
diff --git a/ares_search.c b/ares_search.c
index c65f70f0..3ba26fe1 100644
--- a/ares_search.c
+++ b/ares_search.c
@@ -16,16 +16,13 @@
  */
 
 #include "setup.h"
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <ctype.h>
 #include <errno.h>
 
-#if defined(WIN32) && !defined(WATT32)
-#include "nameser.h"
-#endif
-
 #include "ares.h"
 #include "ares_private.h"
 
diff --git a/ares_send.c b/ares_send.c
index 6dc7b762..a5811d36 100644
--- a/ares_send.c
+++ b/ares_send.c
@@ -17,18 +17,16 @@
 
 #include "setup.h"
 
-#if defined(WIN32) && !defined(WATT32)
-#include "nameser.h"
-#else
 #ifdef HAVE_NETINET_IN_H
-#include <netinet/in.h>
+#  include <netinet/in.h>
 #endif
 #ifdef HAVE_ARPA_NAMESER_H
-#include <arpa/nameser.h>
+#  include <arpa/nameser.h>
+#else
+#  include "nameser.h"
 #endif
 #ifdef HAVE_ARPA_NAMESER_COMPAT_H
-#include <arpa/nameser_compat.h>
-#endif
+#  include <arpa/nameser_compat.h>
 #endif
 
 #include <stdlib.h>
diff --git a/inet_net_pton.c b/inet_net_pton.c
index 487cd825..0936aa14 100644
--- a/inet_net_pton.c
+++ b/inet_net_pton.c
@@ -19,23 +19,22 @@
 
 #include "setup.h"
 
-#if defined(WIN32) && !defined(WATT32)
-#include "nameser.h"
-#else
-
 #ifdef HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
+#  include <sys/socket.h>
 #endif
 #ifdef HAVE_NETINET_IN_H
-#include <netinet/in.h>
-#endif
-#ifdef HAVE_ARPA_NAMESER_H
-#include <arpa/nameser.h>
+#  include <netinet/in.h>
 #endif
 #ifdef HAVE_ARPA_INET_H
-#include <arpa/inet.h>
+#  include <arpa/inet.h>
 #endif
-
+#ifdef HAVE_ARPA_NAMESER_H
+#  include <arpa/nameser.h>
+#else
+#  include "nameser.h"
+#endif
+#ifdef HAVE_ARPA_NAMESER_COMPAT_H
+#  include <arpa/nameser_compat.h>
 #endif
 
 #include <ctype.h>
diff --git a/inet_ntop.c b/inet_ntop.c
index d07e19e3..914576f5 100644
--- a/inet_ntop.c
+++ b/inet_ntop.c
@@ -18,21 +18,22 @@
 
 #include "setup.h"
 
-#if defined(WIN32) && !defined(WATT32)
-#include "nameser.h"
-#else
 #ifdef HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
+#  include <sys/socket.h>
 #endif
 #ifdef HAVE_NETINET_IN_H
-#include <netinet/in.h>
-#endif
-#ifdef HAVE_ARPA_NAMESER_H
-#include <arpa/nameser.h>
+#  include <netinet/in.h>
 #endif
 #ifdef HAVE_ARPA_INET_H
-#include <arpa/inet.h>
+#  include <arpa/inet.h>
+#endif
+#ifdef HAVE_ARPA_NAMESER_H
+#  include <arpa/nameser.h>
+#else
+#  include "nameser.h"
 #endif
+#ifdef HAVE_ARPA_NAMESER_COMPAT_H
+#  include <arpa/nameser_compat.h>
 #endif
 
 #include <ctype.h>
diff --git a/nameser.h b/nameser.h
index 52c29723..3d800964 100644
--- a/nameser.h
+++ b/nameser.h
@@ -5,7 +5,7 @@
 
 /* header file provided by liren@vivisimo.com */
 
-
+#ifndef HAVE_ARPA_NAMESER_H
 
 #define NS_PACKETSZ     512   /* maximum packet size */
 #define NS_MAXDNAME     256   /* maximum domain name */
@@ -117,9 +117,9 @@ typedef enum __ns_rcode {
     ns_r_badtime = 18
 } ns_rcode;
 
+#endif /* HAVE_ARPA_NAMESER_H */
 
-
-
+#ifndef HAVE_ARPA_NAMESER_COMPAT_H
 
 #define PACKETSZ         NS_PACKETSZ
 #define MAXDNAME         NS_MAXDNAME
@@ -189,6 +189,6 @@ typedef enum __ns_rcode {
 #define T_MAILA         ns_t_maila
 #define T_ANY           ns_t_any
 
-
+#endif /* HAVE_ARPA_NAMESER_COMPAT_H */
 
 #endif /* ARES_NAMESER_H */
diff --git a/windows_port.c b/windows_port.c
index cc31036a..fd13b148 100644
--- a/windows_port.c
+++ b/windows_port.c
@@ -5,20 +5,6 @@
 /* only do the following on windows
  */
 #if (defined(WIN32) || defined(WATT32)) && !defined(MSDOS)
-#include <stdio.h>
-#include <stdlib.h>
-#include <ctype.h>
-#include <string.h>
-#include <errno.h>
-#include <malloc.h>
-
-#ifdef WATT32
-#include <sys/socket.h>
-#else
-#include "nameser.h"
-#endif
-#include "ares.h"
-#include "ares_private.h"
 
 #ifdef __WATCOMC__
 /*
@@ -34,5 +20,4 @@ WINAPI DllMain (HINSTANCE hnd, DWORD reason, LPVOID reserved)
 }
 #endif
 
-
 #endif /* WIN32 builds only */