diff --git a/git_cl.py b/git_cl.py
index e2a32388b2..8e45c1161c 100755
--- a/git_cl.py
+++ b/git_cl.py
@@ -7127,7 +7127,7 @@ def _FindFilesToFormat(
     if opts.full:
         files = RunGitDiffCmd(['--name-only', '--diff-filter=d'],
                               upstream_commit, files).splitlines()
-        return files.keys(), None
+        return files, None
 
     diffs = _SplitDiffsByFile(
         RunGitDiffCmd(['-U0'], upstream_commit, files, allow_prefix=True))