diff --git a/src/common.h b/src/common.h
index 98109ae3a..cdfc13657 100644
--- a/src/common.h
+++ b/src/common.h
@@ -38,6 +38,7 @@
 # include <direct.h>
 # include <winsock2.h>
 # include <windows.h>
+# include <ws2tcpip.h>
 # include "win32/msvc-compat.h"
 # include "win32/mingw-compat.h"
 # include "win32/error.h"