diff --git a/libavformat/network.c b/libavformat/network.c
index 432084faa4..c2f7a9b0de 100644
--- a/libavformat/network.c
+++ b/libavformat/network.c
@@ -164,6 +164,14 @@ int ff_neterrno(void)
         return AVERROR(EAGAIN);
     case WSAEINTR:
         return AVERROR(EINTR);
+    case WSAEPROTONOSUPPORT:
+        return AVERROR(EPROTONOSUPPORT);
+    case WSAETIMEDOUT:
+        return AVERROR(ETIMEDOUT);
+    case WSAECONNREFUSED:
+        return AVERROR(ECONNREFUSED);
+    case WSAEINPROGRESS:
+        return AVERROR(EINPROGRESS);
     }
     return -err;
 }
diff --git a/libavformat/network.h b/libavformat/network.h
index 3e4422e4c2..793cfee9a9 100644
--- a/libavformat/network.h
+++ b/libavformat/network.h
@@ -35,10 +35,19 @@
 #include <winsock2.h>
 #include <ws2tcpip.h>
 
+#ifndef EPROTONOSUPPORT
 #define EPROTONOSUPPORT WSAEPROTONOSUPPORT
+#endif
+#ifndef ETIMEDOUT
 #define ETIMEDOUT       WSAETIMEDOUT
+#endif
+#ifndef ECONNREFUSED
 #define ECONNREFUSED    WSAECONNREFUSED
+#endif
+#ifndef EINPROGRESS
 #define EINPROGRESS     WSAEINPROGRESS
+#endif
+
 #define getsockopt(a, b, c, d, e) getsockopt(a, b, c, (char*) d, e)
 #define setsockopt(a, b, c, d, e) setsockopt(a, b, c, (const char*) d, e)