diff --git a/reactos/include/psdk/ws2tcpip.h b/reactos/include/psdk/ws2tcpip.h
index a3487f33007..0210293d99f 100644
--- a/reactos/include/psdk/ws2tcpip.h
+++ b/reactos/include/psdk/ws2tcpip.h
@@ -24,7 +24,7 @@ extern "C" {
 #ifdef _MSC_VER
 #define WS2TCPIP_INLINE __inline
 #else
-#define WS2TCPIP_INLINE static inline
+#define WS2TCPIP_INLINE extern inline
 #endif
 
 /* getaddrinfo error codes */
@@ -758,7 +758,7 @@ idealsendbacklogquery(
 {
   DWORD bytes;
 
-  return WSAIoctl(s, SIO_IDEAL_SEND_BACKLOG_QUERY, 
+  return WSAIoctl(s, SIO_IDEAL_SEND_BACKLOG_QUERY,
                   NULL, 0, pISB, sizeof(*pISB), &bytes, NULL, NULL);
 }
 
@@ -771,8 +771,8 @@ idealsendbacklognotify(
 {
   DWORD bytes;
 
-  return WSAIoctl(s, SIO_IDEAL_SEND_BACKLOG_CHANGE, 
-                  NULL, 0, NULL, 0, &bytes, 
+  return WSAIoctl(s, SIO_IDEAL_SEND_BACKLOG_CHANGE,
+                  NULL, 0, NULL, 0, &bytes,
                   lpOverlapped, lpCompletionRoutine);
 }