diff --git a/mercurial/repair.py b/mercurial/repair.py
--- a/mercurial/repair.py
+++ b/mercurial/repair.py
@@ -237,7 +237,7 @@ def rebuildfncache(ui, repo):
 
     if 'fncache' not in repo.requirements:
         ui.warn(_('(not rebuilding fncache because repository does not '
-                  'support fncache\n'))
+                  'support fncache)\n'))
         return
 
     lock = repo.lock()
diff --git a/tests/test-fncache.t b/tests/test-fncache.t
--- a/tests/test-fncache.t
+++ b/tests/test-fncache.t
@@ -308,7 +308,7 @@ debugrebuildfncache does nothing unless 
   $ hg --config format.usefncache=false init nofncache
   $ cd nofncache
   $ hg debugrebuildfncache
-  (not rebuilding fncache because repository does not support fncache
+  (not rebuilding fncache because repository does not support fncache)
 
   $ cd ..