diff --git a/ares.h b/ares.h
index 9f4413f6..de52a0b9 100644
--- a/ares.h
+++ b/ares.h
@@ -96,7 +96,7 @@ extern "C" {
 
 /* ares_library_init error codes */
 #define ARES_ELOADIPHLPAPI           21
-#define ARES_EADDRGetNetworkParams   22
+#define ARES_EADDRGETNETWORKPARAMS   22
 
 /* Flag values */
 #define ARES_FLAG_USEVC         (1 << 0)
diff --git a/ares_library_init.c b/ares_library_init.c
index b3e8dc9e..4ed7dfdc 100644
--- a/ares_library_init.c
+++ b/ares_library_init.c
@@ -38,7 +38,7 @@ static int ares_win32_init(void)
   if (!fpGetNetworkParams)
     {
       FreeLibrary(hnd_iphlpapi);
-      return ARES_EADDRGetNetworkParams;
+      return ARES_EADDRGETNETWORKPARAMS;
     }
 
   /*