diff --git a/src/stratifier.c b/src/stratifier.c
index 1039736d..fcc2dcbe 100644
--- a/src/stratifier.c
+++ b/src/stratifier.c
@@ -1987,7 +1987,8 @@ static json_t *parse_submit(stratum_instance_t *client, json_t *json_msg,
 	}
 	invalid = false;
 out_submit:
-	submit = wb->proxy;
+	if (wb->proxy && sdiff >= wdiff)
+		submit = true;
 out_unlock:
 	ck_runlock(&workbase_lock);