diff --git a/src/conf/nwfilter_conf.h b/src/conf/nwfilter_conf.h
index 1a38e4198c..7c09b3bcb9 100644
--- a/src/conf/nwfilter_conf.h
+++ b/src/conf/nwfilter_conf.h
@@ -522,9 +522,11 @@ struct _virNWFilterDef {
 
 void
 virNWFilterRuleDefFree(virNWFilterRuleDef *def);
+G_DEFINE_AUTOPTR_CLEANUP_FUNC(virNWFilterRuleDef, virNWFilterRuleDefFree);
 
 void
 virNWFilterDefFree(virNWFilterDef *def);
+G_DEFINE_AUTOPTR_CLEANUP_FUNC(virNWFilterDef, virNWFilterDefFree);
 
 int
 virNWFilterTriggerRebuild(void);