diff --git a/libmalcontent/app-filter.h b/libmalcontent/app-filter.h
index c77f62a..5b7573b 100644
--- a/libmalcontent/app-filter.h
+++ b/libmalcontent/app-filter.h
@@ -159,6 +159,9 @@ GType mct_app_filter_builder_get_type (void);
     g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL), \
     TRUE, \
     FALSE, \
+    /* padding: */ \
+    NULL, \
+    NULL \
   }
 
 void mct_app_filter_builder_init  (MctAppFilterBuilder *builder);