--- a/src/jansson.h
+++ b/src/jansson.h
@@ -126,6 +126,7 @@ int json_object_set_new_nocheck(json_t *
 int json_object_del(json_t *object, const char *key);
 int json_object_clear(json_t *object);
 int json_object_update(json_t *object, json_t *other);
+int json_object_deep_update(json_t *object, json_t *other);
 void *json_object_iter(json_t *object);
 void *json_object_iter_at(json_t *object, const char *key);
 void *json_object_iter_next(json_t *object, void *iter);