--- a/mail/messenger/messenger.ftl
+++ b/mail/messenger/messenger.ftl
@@ -239,16 +239,28 @@ spaces-pinned-button-menuitem-address-bo
 spaces-pinned-button-menuitem-calendar =
     .label = { spaces-toolbar-button-calendar.title }
 spaces-pinned-button-menuitem-tasks =
     .label = { spaces-toolbar-button-tasks.title }
 spaces-pinned-button-menuitem-chat =
     .label = { spaces-toolbar-button-chat.title }
 spaces-pinned-button-menuitem-settings =
     .label = { spaces-toolbar-button-settings2.title }
+spaces-pinned-button-menuitem-mail2 =
+    .label = { spaces-toolbar-button-mail2.title }
+spaces-pinned-button-menuitem-address-book2 =
+    .label = { spaces-toolbar-button-address-book2.title }
+spaces-pinned-button-menuitem-calendar2 =
+    .label = { spaces-toolbar-button-calendar2.title }
+spaces-pinned-button-menuitem-tasks2 =
+    .label = { spaces-toolbar-button-tasks2.title }
+spaces-pinned-button-menuitem-chat2 =
+    .label = { spaces-toolbar-button-chat2.title }
+spaces-pinned-button-menuitem-settings2 =
+    .label = { spaces-toolbar-button-settings2.title }
 spaces-pinned-button-menuitem-show =
     .label = { spaces-toolbar-button-show.title }
 # Variables:
 # $count (Number) - Number of unread messages.
 chat-button-unread-messages = { $count }
     .title =
         { $count ->
             [one] One unread message