diff --git a/Modules/socketmodule.c b/Modules/socketmodule.c
index 0a71a50..5815ecf 100644
--- a/Modules/socketmodule.c
+++ b/Modules/socketmodule.c
@@ -297,9 +297,11 @@
 #endif
 
 #ifndef HAVE_INET_PTON
+#if !defined(NTDDI_VERSION) || (NTDDI_VERSION < NTDDI_LONGHORN)
 int inet_pton(int af, const char *src, void *dst);
 const char *inet_ntop(int af, const void *src, char *dst, socklen_t size);
 #endif
+#endif
 
 #ifdef __APPLE__
 /* On OS X, getaddrinfo returns no error indication of lookup
@@ -5039,6 +5041,7 @@
 
 
 #ifndef HAVE_INET_PTON
+#if !defined(NTDDI_VERSION) || (NTDDI_VERSION < NTDDI_LONGHORN)
 
 /* Simplistic emulation code for inet_pton that only works for IPv4 */
 /* These are not exposed because they do not set errno properly */
@@ -5074,3 +5077,4 @@
 }
 
 #endif
+#endif