diff --git a/mercurial/cmdutil.py b/mercurial/cmdutil.py
--- a/mercurial/cmdutil.py
+++ b/mercurial/cmdutil.py
@@ -2523,7 +2523,7 @@ def getlogrevs(repo, pats, opts):
         if not (revs.isdescending() or revs.istopo()):
             revs.sort(reverse=True)
     if expr:
-        matcher = revset.match(repo.ui, expr)
+        matcher = revset.match(None, expr)
         revs = matcher(repo, revs)
     if limit is not None:
         revs = revs.slice(0, limit)
diff --git a/tests/test-log.t b/tests/test-log.t
--- a/tests/test-log.t
+++ b/tests/test-log.t
@@ -1252,6 +1252,16 @@ User
   
   $ hg log -u "user3"
 
+"-u USER" shouldn't be overridden by "user(USER)" alias
+
+  $ hg log --config 'revsetalias.user(x)=branch(x)' -u default
+  $ hg log --config 'revsetalias.user(x)=branch(x)' -u user1
+  changeset:   0:29a4c94f1924
+  user:        User One <user1@example.org>
+  date:        Thu Jan 01 00:00:00 1970 +0000
+  summary:     a
+  
+
   $ cd ..
 
   $ hg init branches