diff --git a/mkdir.c b/mkdir.c
index 8080797..781654a 100644
--- a/mkdir.c
+++ b/mkdir.c
@@ -30,7 +30,7 @@ main(int argc, char *argv[])
 		break;
 	case 'm':
 		mflag = true;
-		mode = estrtol(EARGF(usage()), 10);
+		mode = estrtol(EARGF(usage()), 8);
 		break;
 	default:
 		usage();