diff --git a/source/bubel/ecs/manager.d b/source/bubel/ecs/manager.d
index 5c343e6..f1edf5c 100644
--- a/source/bubel/ecs/manager.d
+++ b/source/bubel/ecs/manager.d
@@ -1305,7 +1305,7 @@ export struct EntityManager
         //     static assert(0, "Add \"mixin ECS.Component;\" in top of component structure;");
         // }
 
-        static if (hasMember!(Comp, "onDestroy") && isFunction!(Comp.onDestroy)
+        static if (__traits(hasMember, Comp.init, "onDestroy") && isFunction!(Comp.onDestroy)
             && is(ReturnType!(Comp.onDestroy) == void)
             && Parameters!(Comp.onDestroy).length == 0)
         {
@@ -1317,7 +1317,7 @@ export struct EntityManager
             info.destroy_callback = &callDestroy;
         }
 
-        static if (hasMember!(Comp, "onCreate") && isFunction!(Comp.onCreate)
+        static if (__traits(hasMember, Comp.init, "onCreate") && isFunction!(Comp.onCreate)
             && is(ReturnType!(Comp.onCreate) == void) && Parameters!(Comp.onCreate).length == 0)
         {
             static void callCreate(void* pointer) nothrow @nogc