diff --git a/src/game/Unit.cpp b/src/game/Unit.cpp
index 6d624cd82d..574ef8a50d 100644
--- a/src/game/Unit.cpp
+++ b/src/game/Unit.cpp
@@ -19,6 +19,7 @@
  */
 
 #include "Common.h"
+#include "CreatureAIImpl.h"
 #include "Log.h"
 #include "Opcodes.h"
 #include "WorldPacket.h"