diff --git a/mercurial/cmdutil.py b/mercurial/cmdutil.py
--- a/mercurial/cmdutil.py
+++ b/mercurial/cmdutil.py
@@ -3171,7 +3171,7 @@ def _performrevert(repo, parents, ctx, a
     for f in actions['forget'][0]:
         if interactive:
             choice = repo.ui.promptchoice(
-                _("forget added file %s (yn)?$$ &Yes $$ &No") % f)
+                _("forget added file %s (Yn)?$$ &Yes $$ &No") % f)
             if choice == 0:
                 repo.dirstate.drop(f)
             else:
diff --git a/tests/test-revert-interactive.t b/tests/test-revert-interactive.t
--- a/tests/test-revert-interactive.t
+++ b/tests/test-revert-interactive.t
@@ -424,14 +424,14 @@ Check the experimental config to invert 
   > n
   > EOF
   forgetting newfile
-  forget added file newfile (yn)? n
+  forget added file newfile (Yn)? n
   $ hg status
   A newfile
   $ hg revert -i <<EOF
   > y
   > EOF
   forgetting newfile
-  forget added file newfile (yn)? y
+  forget added file newfile (Yn)? y
   $ hg status
   ? newfile