diff --git a/src/server/game/AI/CoreAI/GameObjectAI.h b/src/server/game/AI/CoreAI/GameObjectAI.h
index ba1f54b4b48..13300468bec 100644
--- a/src/server/game/AI/CoreAI/GameObjectAI.h
+++ b/src/server/game/AI/CoreAI/GameObjectAI.h
@@ -21,6 +21,7 @@
 
 #include "Define.h"
 #include "QuestDef.h"
+#include "ObjectGuid.h"
 
 class GameObject;
 class Unit;