diff --git a/src/corelib/object.h b/src/corelib/object.h
index ffa0659..362efb6 100644
--- a/src/corelib/object.h
+++ b/src/corelib/object.h
@@ -25,7 +25,7 @@ object_t object_default();
 
 void object_draw_sprite(object_t* object);
 static inline
-int object_is_valid(object_t* object) {
+int object_is_valid(const object_t* object) {
 	return object == NULL || object->active == 0;
 }