diff --git a/extensions/sdkhooks/extension.h b/extensions/sdkhooks/extension.h
index 62745ae9..e07bd5c3 100644
--- a/extensions/sdkhooks/extension.h
+++ b/extensions/sdkhooks/extension.h
@@ -142,6 +142,9 @@ public:
 class IEntityListener
 {
 public:
+#if SOURCE_ENGINE == SE_BMS
+	virtual void OnEntityPreSpawned( CBaseEntity *pEntity ) {};
+#endif
 	virtual void OnEntityCreated( CBaseEntity *pEntity ) {};
 	virtual void OnEntitySpawned( CBaseEntity *pEntity ) {};
 	virtual void OnEntityDeleted( CBaseEntity *pEntity ) {};