diff --git a/src/core/iomgr/unix_sockets_posix.c b/src/core/iomgr/unix_sockets_posix.c
index 035b55fa69e..8ff474c6d4b 100644
--- a/src/core/iomgr/unix_sockets_posix.c
+++ b/src/core/iomgr/unix_sockets_posix.c
@@ -35,6 +35,7 @@
 
 #ifdef GPR_HAVE_UNIX_SOCKET
 
+#include <string.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/un.h>
diff --git a/src/core/iomgr/unix_sockets_posix_noop.c b/src/core/iomgr/unix_sockets_posix_noop.c
index 768131581f0..4c41cf5efa6 100644
--- a/src/core/iomgr/unix_sockets_posix_noop.c
+++ b/src/core/iomgr/unix_sockets_posix_noop.c
@@ -34,7 +34,7 @@
 
 #include "src/core/iomgr/unix_sockets_posix.h"
 
-#ifdef GPR_POSIX_SOCKET
+#ifndef GPR_HAVE_UNIX_SOCKET
 
 void grpc_create_socketpair_if_unix(int sv[2]) {}