diff --git a/libvncclient/vncviewer.c b/libvncclient/vncviewer.c
index 8237254..5819c1d 100644
--- a/libvncclient/vncviewer.c
+++ b/libvncclient/vncviewer.c
@@ -21,6 +21,11 @@
  * vncviewer.c - the Xt-based VNC viewer.
  */
 
+#ifdef WIN32
+#undef SOCKET
+#include <winsock2.h>
+#endif
+
 #ifdef __STRICT_ANSI__
 #define _BSD_SOURCE
 #define _POSIX_SOURCE
@@ -44,8 +49,6 @@ static void DummyRect(rfbClient* client, int x, int y, int w, int h) {
 static char* NoPassword(rfbClient* client) {
   return strdup("");
 }
-#undef SOCKET
-#include <winsock2.h>
 #define close closesocket
 #else
 #include <stdio.h>