diff --git a/reactos/include/psdk/mstcpip.h b/reactos/include/psdk/mstcpip.h
index 618b07f6d47..261f5abd67e 100644
--- a/reactos/include/psdk/mstcpip.h
+++ b/reactos/include/psdk/mstcpip.h
@@ -12,7 +12,7 @@ extern "C" {
 #ifdef _MSC_VER
 #define MSTCPIP_INLINE __inline
 #else
-#define MSTCPIP_INLINE extern inline
+#define MSTCPIP_INLINE static inline
 #endif
 
 #include <nldef.h>
diff --git a/reactos/include/psdk/ws2ipdef.h b/reactos/include/psdk/ws2ipdef.h
index d2005dfec93..1aba90e6249 100644
--- a/reactos/include/psdk/ws2ipdef.h
+++ b/reactos/include/psdk/ws2ipdef.h
@@ -13,7 +13,7 @@ extern "C" {
 #ifdef _MSC_VER
 #define WS2TCPIP_INLINE __inline
 #else
-#define WS2TCPIP_INLINE extern inline
+#define WS2TCPIP_INLINE static inline
 #endif
 
 #include <in6addr.h>
diff --git a/reactos/include/psdk/ws2tcpip.h b/reactos/include/psdk/ws2tcpip.h
index 0210293d99f..b4c8a049d89 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 extern inline
+#define WS2TCPIP_INLINE static inline
 #endif
 
 /* getaddrinfo error codes */