diff --git a/homeassistant/components/mqtt/strings.json b/homeassistant/components/mqtt/strings.json
index c062c111487..3b337c05d2a 100644
--- a/homeassistant/components/mqtt/strings.json
+++ b/homeassistant/components/mqtt/strings.json
@@ -115,7 +115,7 @@
       "bad_ws_headers": "Supply valid HTTP headers as a JSON object",
       "cannot_connect": "[%key:common::config_flow::error::cannot_connect%]",
       "invalid_auth": "[%key:common::config_flow::error::invalid_auth%]",
-      "invalid_inclusion": "The client certificate and private key must be configurered together"
+      "invalid_inclusion": "The client certificate and private key must be configured together"
     }
   },
   "device_automation": {