diff --git a/shared/nm-utils/nm-jansson.h b/shared/nm-utils/nm-jansson.h
index b00c75c6fe..cacf87a6a0 100644
--- a/shared/nm-utils/nm-jansson.h
+++ b/shared/nm-utils/nm-jansson.h
@@ -41,6 +41,9 @@
             n = json_object_iter_next(object, json_object_key_to_iter(key)))
 #endif
 
+NM_AUTO_DEFINE_FCN0 (json_t *, _nm_auto_decref_json, json_decref)
+#define nm_auto_decref_json nm_auto(_nm_auto_decref_json)
+
 #endif /* WITH_JANSON */
 
 #endif  /* __NM_JANSSON_H__ */