diff --git a/master/slave_config.c b/master/slave_config.c
index c0eed56dae3486a83f70b7efafd349bece18f8a9..4146ad0043a60bb460545e36de08268937b8ac57 100644
--- a/master/slave_config.c
+++ b/master/slave_config.c
@@ -420,7 +420,7 @@ int ec_slave_config_attach(
 		relative_position++;
 	}
 
-	EC_ERR("Failed to find slave for configuration %u:%u.\n",
+	EC_WARN("Failed to find slave for configuration %u:%u.\n",
 			sc->alias, sc->position);
 	return -1;