diff --git a/contrib/perf.py b/contrib/perf.py
--- a/contrib/perf.py
+++ b/contrib/perf.py
@@ -712,9 +712,9 @@
         fm.end()
 
 @command(b'perfchangegroupchangelog', formatteropts +
-         [(b'', b'version', b'02', b'changegroup version'),
+         [(b'', b'cgversion', b'02', b'changegroup version'),
           (b'r', b'rev', b'', b'revisions to add to changegroup')])
-def perfchangegroupchangelog(ui, repo, version=b'02', rev=None, **opts):
+def perfchangegroupchangelog(ui, repo, cgversion=b'02', rev=None, **opts):
     """Benchmark producing a changelog group for a changegroup.
 
     This measures the time spent processing the changelog during a
@@ -727,7 +727,7 @@
     opts = _byteskwargs(opts)
     cl = repo.changelog
     nodes = [cl.lookup(r) for r in repo.revs(rev or b'all()')]
-    bundler = changegroup.getbundler(version, repo)
+    bundler = changegroup.getbundler(cgversion, repo)
 
     def d():
         state, chunks = bundler._generatechangelog(cl, nodes)
diff --git a/tests/test-contrib-perf.t b/tests/test-contrib-perf.t
--- a/tests/test-contrib-perf.t
+++ b/tests/test-contrib-perf.t
@@ -145,6 +145,7 @@
   $ hg perfbranchmap
   $ hg perfcca
   $ hg perfchangegroupchangelog
+  $ hg perfchangegroupchangelog --cgversion 01
   $ hg perfchangeset 2
   $ hg perfctxfiles 2
   $ hg perfdiffwd