diff --git a/src/server/game/Maps/Map.h b/src/server/game/Maps/Map.h
index 48864180b84..db71b6f01fa 100644
--- a/src/server/game/Maps/Map.h
+++ b/src/server/game/Maps/Map.h
@@ -768,6 +768,7 @@ class TC_GAME_API InstanceMap : public Map
         bool Reset(uint8 method);
         uint32 GetScriptId() const { return i_script_id; }
         InstanceScript* GetInstanceScript() { return i_data; }
+        InstanceScript const* GetInstanceScript() const { return i_data; }
         void PermBindAllPlayers(Player* source);
         void UnloadAll() override;
         EnterState CannotEnter(Player* player) override;
diff --git a/src/server/game/Scripting/ScriptMgr.h b/src/server/game/Scripting/ScriptMgr.h
index d0f9ad32f1c..5101e2d8967 100644
--- a/src/server/game/Scripting/ScriptMgr.h
+++ b/src/server/game/Scripting/ScriptMgr.h
@@ -435,7 +435,7 @@ class TC_GAME_API CreatureScript : public UnitScript, public UpdatableScript<Cre
         virtual uint32 GetDialogStatus(Player* /*player*/, Creature* /*creature*/) { return DIALOG_STATUS_SCRIPTED_NO_STATUS; }
 
         // Called when the creature tries to spawn. Return false to block spawn and re-evaluate on next tick.
-        virtual bool CanSpawn(ObjectGuid::LowType /*spawnId*/, CreatureTemplate const* /*cTemplate*/, CreatureData const* /*cData*/, Map const* /*map*/) { return true; }
+        virtual bool CanSpawn(ObjectGuid::LowType /*spawnId*/, CreatureTemplate const* /*cTemplate*/, CreatureData const* /*cData*/, Map const* /*map*/) const { return true; }
 
         // Called when a CreatureAI object is needed for the creature.
         virtual CreatureAI* GetAI(Creature* /*creature*/) const { return NULL; }