Index: uspace/app/mkexfat/mkexfat.c
===================================================================
--- uspace/app/mkexfat/mkexfat.c	(revision 50e754ec0613ebeecbbc0541537c6b3ec88bf3ab)
+++ uspace/app/mkexfat/mkexfat.c	(revision 69c4172ec4673f19dd424cd32fc55cf20d83b25d)
@@ -204,6 +204,7 @@
 	pfat[0] = pfat[1] = 0x00000000;
 
-	for (i = FAT_SECTOR_START + 1; i < cfg->fat_sector_count; ++i) {
-		rc = block_write_direct(service_id, i, 1, pfat);
+	for (i = 0; i < cfg->fat_sector_count; ++i) {
+		rc = block_write_direct(service_id,
+		    FAT_SECTOR_START + i + 1, 1, pfat);
 		if (rc != EOK)
 			goto error;