diff --git a/network/main/win-dns.cpp b/network/main/win-dns.cpp
index ee5f827efb89..627421b3e1bf 100644
--- a/network/main/win-dns.cpp
+++ b/network/main/win-dns.cpp
@@ -18,7 +18,9 @@
  */
 #ifdef XP_PC
 #include <windows.h>
+#ifdef WIN32_LEAN_AND_MEAN
 #include <winsock2.h>
+#endif
 #include "net.h"
 #include "nsISupports.h"
 #include "merrors.h"