diff --git a/src/include/port/win32/netdb.h b/src/include/port/win32/netdb.h
index f0cc2c2367e..9ed13e457b8 100644
--- a/src/include/port/win32/netdb.h
+++ b/src/include/port/win32/netdb.h
@@ -4,6 +4,4 @@
 
 #include <ws2tcpip.h>
 
-#define gai_strerror gai_strerrorA
-
 #endif
diff --git a/src/include/port/win32/sys/socket.h b/src/include/port/win32/sys/socket.h
index 9b2cdf3b9bc..0c32c0f7b2e 100644
--- a/src/include/port/win32/sys/socket.h
+++ b/src/include/port/win32/sys/socket.h
@@ -23,11 +23,4 @@
 #define ERROR PGERROR
 #endif
 
-/*
- * we can't use the windows gai_strerror{AW} functions because
- * they are defined inline in the MS header files. So we'll use our
- * own
- */
-#undef gai_strerror
-
 #endif							/* WIN32_SYS_SOCKET_H */