diff --git a/src/_locales/en/messages.json b/src/_locales/en/messages.json
index 02ff8c8ec..4e39f9f49 100644
--- a/src/_locales/en/messages.json
+++ b/src/_locales/en/messages.json
@@ -1270,7 +1270,7 @@
     "description": "Summary of number of errors as reported by the linter "
   },
   "unprocessedRequestTooltip": {
-    "message": "Could not filter properly at browser launch.\nReload the page to ensure proper filtering",
+    "message": "Could not filter properly at browser launch.\nReload the page to ensure proper filtering.",
     "description": "Tooltip for the toolbar icon. Use newline character(s) where appropriate to prevent tooltip from being too long horizontally"
   },
   "dummy": {