diff --git a/src/stratifier.c b/src/stratifier.c
index d3511277..aeba3757 100644
--- a/src/stratifier.c
+++ b/src/stratifier.c
@@ -1967,7 +1967,8 @@ static int send_recv_auth(stratum_instance_t *client)
 
 		LOGINFO("Got ckdb response: %s", buf);
 		if (unlikely(sscanf(buf, "id.%*d.%s", response) < 1 || strlen(response) < 1 || !strchr(response, '='))) {
-			LOGWARNING("Got unparseable ckdb auth response: %s", buf);
+			if (!cmdmatch(response, "failed"))
+				LOGWARNING("Got unparseable ckdb auth response: %s", buf);
 			goto out_fail;
 		}
 		cmd = response;