Index: src/tar.c
==================================================================
--- src/tar.c
+++ src/tar.c
@@ -542,11 +542,11 @@
   zName = find_option("name", 0, 1);
   db_find_and_open_repository(0, 0);
   if( g.argc!=4 ){
     usage("VERSION OUTPUTFILE");
   }
-  rid = name_to_typed_rid(g.argv[3], "ci");
+  rid = name_to_typed_rid(g.argv[2], "ci");
   if( rid==0 ){
     fossil_fatal("Checkin not found: %s", g.argv[2]);
     return;
   }