diff --git a/mercurial/discovery.py b/mercurial/discovery.py
--- a/mercurial/discovery.py
+++ b/mercurial/discovery.py
@@ -316,7 +316,7 @@ def checkheads(repo, remote, outgoing, r
                     error = (_("push creates multiple headed new branch '%s'")
                              % (branch))
                     hint = _("merge or"
-                             " see \"hg help push\" for detail about"
+                             " see \"hg help push\" for details about"
                              " pushing new heads")
         elif len(newhs) > len(oldhs):
             # strip updates to existing remote heads from the new heads list
diff --git a/tests/test-push-warn.t b/tests/test-push-warn.t
--- a/tests/test-push-warn.t
+++ b/tests/test-push-warn.t
@@ -368,7 +368,7 @@ Pushing muliple headed new branch:
   pushing to ../f
   searching for changes
   abort: push creates multiple headed new branch 'f'
-  (merge or see "hg help push" for detail about pushing new heads)
+  (merge or see "hg help push" for details about pushing new heads)
   [255]
   $ hg push --branch f --new-branch --force ../f
   pushing to ../f