diff --git a/disk/part.c b/disk/part.c
index b95405b..79955c7 100644
--- a/disk/part.c
+++ b/disk/part.c
@@ -527,6 +527,8 @@
 	/* Look up the device */
 	dev = blk_get_device_by_str(ifname, dev_str, dev_desc);
 	if (dev < 0) {
+		printf("** Bad device specification %s %s **\n",
+		       ifname, dev_str);
 		ret = dev;
 		goto cleanup;
 	}