Index: uspace/srv/fs/exfat/exfat_fat.c
===================================================================
--- uspace/srv/fs/exfat/exfat_fat.c	(revision a9b756e22f473424c72d34adee42971bbaa0a107)
+++ uspace/srv/fs/exfat/exfat_fat.c	(revision ae560da5d80eb3666300ce8f2ddc5a527593550b)
@@ -374,4 +374,7 @@
 		if (rc != EOK)
 			return rc;
+		rc = bitmap_clear_cluster(bs, devmap_handle, firstc);
+		if (rc != EOK)
+			return rc;
 		firstc = nextc;
 	}