diff --git a/winsup/w32api/ChangeLog b/winsup/w32api/ChangeLog
index 73002c0df..d73eeca9c 100644
--- a/winsup/w32api/ChangeLog
+++ b/winsup/w32api/ChangeLog
@@ -1,3 +1,8 @@
+2003-03-12  Earnie Boyd  <earnie@users.sf.net>
+
+	* include/mswsock.h: Correct invalid filter for _WINSOCK2_H.
+	Thanks to Jim Barton <jmbarton@users.sf.net>.
+
 2003-03-12  Ranjit Mathew  <rmathew@hotmail.com>
 
         * include/winnt.h (_IMAGE_SEPARATE_DEBUG_HEADER): Expose
diff --git a/winsup/w32api/include/mswsock.h b/winsup/w32api/include/mswsock.h
index 385d0b2c3..0cea0b840 100644
--- a/winsup/w32api/include/mswsock.h
+++ b/winsup/w32api/include/mswsock.h
@@ -54,7 +54,7 @@ BOOL PASCAL TransmitFile(SOCKET,HANDLE,DWORD,DWORD,LPOVERLAPPED,LPTRANSMIT_FILE_
 BOOL PASCAL AcceptEx(SOCKET,SOCKET,PVOID,DWORD,DWORD,DWORD,LPDWORD,LPOVERLAPPED);
 VOID PASCAL GetAcceptExSockaddrs(PVOID,DWORD,DWORD,DWORD,struct sockaddr**, LPINT, struct sockaddr**, LPINT);
 
-#ifdef WINSOCK2_H /* These require the winsock2 interface.  */
+#ifdef _WINSOCK2_H /* These require the winsock2 interface.  */
 
 #define TP_ELEMENT_FILE		1
 #define TP_ELEMENT_MEMORY	2
@@ -104,7 +104,7 @@ typedef struct wsacmsghdr {
 BOOL PASCAL DisconnectEx(SOCKET,LPOVERLAPPED,DWORD,DWORD);
 int PASCAL WSARecvMsg(SOCKET,LPWSAMSG,LPDWORD,LPWSAOVERLAPPED,LPWSAOVERLAPPED_COMPLETION_ROUTINE);
 
-#endif /* WINSOCK2_H */
+#endif /* _WINSOCK2_H */
 
 #ifdef __cplusplus
 }