diff --git a/json_object.h b/json_object.h
index 9105d4a..215c291 100644
--- a/json_object.h
+++ b/json_object.h
@@ -1009,7 +1009,7 @@ json_c_shallow_copy_fn json_c_shallow_copy_default;
  *          or if the destination pointer is non-NULL
  */
 
-JSON_EXPORT int json_object_deep_copy(struct json_object *src, struct json_object **dst, json_c_shallow_copy_fn shallow_copy); 
+JSON_EXPORT int json_object_deep_copy(struct json_object *src, struct json_object **dst, json_c_shallow_copy_fn *shallow_copy); 
 #ifdef __cplusplus
 }
 #endif