diff --git a/dlls/mswsock/mswsock.c b/dlls/mswsock/mswsock.c
index ceb0d19da0e..fbd4a8c39fd 100644
--- a/dlls/mswsock/mswsock.c
+++ b/dlls/mswsock/mswsock.c
@@ -61,8 +61,10 @@ BOOL WINAPI AcceptEx(
                                       overlapped (asynchronous) I/O 
                                       operation */
 {
-    FIXME("not implemented\n");
-  
+    FIXME("(listen=%d, accept=%d, %p, %d, %d, %d, %p, %p), not implemented\n",
+	sListenSocket,sAcceptSocket,lpOutputBuffer,dwReceiveDataLength,
+	dwLocalAddressLength,dwRemoteAddressLength,lpdwBytesReceived,lpOverlapped
+    );
     return FALSE;
 }