diff --git a/src/infrastructure/internationalization/translation/PhabricatorUSEnglishTranslation.php b/src/infrastructure/internationalization/translation/PhabricatorUSEnglishTranslation.php
--- a/src/infrastructure/internationalization/translation/PhabricatorUSEnglishTranslation.php
+++ b/src/infrastructure/internationalization/translation/PhabricatorUSEnglishTranslation.php
@@ -1402,8 +1402,10 @@
       ),
 
       'Setting retention policy for "%s" to %s day(s).' => array(
-        'Setting retention policy for "%s" to one day.',
-        'Setting retention policy for "%s" to %s days.',
+        array(
+          'Setting retention policy for "%s" to one day.',
+          'Setting retention policy for "%s" to %s days.',
+        ),
       ),
 
       'Waiting %s second(s) for lease to activate.' => array(