diff --git a/src/game/OutdoorPvP.h b/src/game/OutdoorPvP.h
index ad52670179..3c3db7a49a 100644
--- a/src/game/OutdoorPvP.h
+++ b/src/game/OutdoorPvP.h
@@ -20,6 +20,7 @@
 #define OUTDOOR_PVP_H_
 
 #include "Util.h"
+#include "SharedDefines.h"
 
 #include <map>
 #include <set>