diff --git a/config/locales/client.en.yml b/config/locales/client.en.yml
index 7e182d3dc..51eb4696b 100644
--- a/config/locales/client.en.yml
+++ b/config/locales/client.en.yml
@@ -844,6 +844,7 @@ en:
         edited: '{{username}} edited your post in "{{topic}}"'
         liked: '{{username}} liked your post in "{{topic}}"'
         private_message: '{{username}} sent you a private message in "{{topic}}"'
+        private_message_mul: '{{username}} in "{{topic}}"'
         invited_to_private_message: '{{username}} invited you to a private message: "{{topic}}"'
         invitee_accepted: '{{username}} joined the forum!'
         moved_post: '{{username}} moved your post in "{{topic}}"'