{ "count-objects", cmd_count_objects, RUN_SETUP },
{ "describe", cmd_describe, RUN_SETUP },
{ "diff", cmd_diff },
- { "diff-files", cmd_diff_files, RUN_SETUP },
+ { "diff-files", cmd_diff_files, RUN_SETUP | NEED_WORK_TREE },
{ "diff-index", cmd_diff_index, RUN_SETUP },
{ "diff-tree", cmd_diff_tree, RUN_SETUP },
{ "fast-export", cmd_fast_export, RUN_SETUP },