diff --git a/util-linux/losetup.c b/util-linux/losetup.c
index 44721bd34..24639ad1c 100644
--- a/util-linux/losetup.c
+++ b/util-linux/losetup.c
@@ -39,7 +39,7 @@ die_failed:
       bb_perror_msg_and_die("%s",argv[optind]);
 
     case 'o':
-      offset = bb_xparse_number (optarg, NULL);
+      offset = atol(optarg);
       /* Fall through to do the losetup */
     case -1:
       /* losetup takes two argument:, loop_device and file */