diff --git a/base_object.h b/base_object.h
index e9183178..231dead1 100644
--- a/base_object.h
+++ b/base_object.h
@@ -59,4 +59,4 @@ inline BaseObject<PythonType>::~BaseObject()
 
 }
 
-#endif BASE_OBJECT_DWA051600_H_
+#endif // BASE_OBJECT_DWA051600_H_