diff --git a/fs/fat/fat.c b/fs/fat/fat.c
index 41ae15e..80156c8 100644
--- a/fs/fat/fat.c
+++ b/fs/fat/fat.c
@@ -85,7 +85,7 @@
 
 	/* Otherwise it might be a superfloppy (whole-disk FAT filesystem) */
 	if (!cur_dev) {
-		if (part_no != 1) {
+		if (part_no != 0) {
 			printf("** Partition %d not valid on device %d **\n",
 					part_no, dev_desc->dev);
 			return -1;