diff --git a/challenges/01-front-end-development-certification/intermediate-bonfires.json b/challenges/01-front-end-development-certification/intermediate-bonfires.json
index d95e51cd8e..aa3db05cbd 100644
--- a/challenges/01-front-end-development-certification/intermediate-bonfires.json
+++ b/challenges/01-front-end-development-certification/intermediate-bonfires.json
@@ -402,7 +402,7 @@
       ],
       "type": "bonfire",
       "MDNlinks": [
-        "String.charCodeAt()",
+        "String.prototype.charCodeAt()",
         "String.fromCharCode()"
       ],
       "isRequired": true,
@@ -903,7 +903,7 @@
       ],
       "type": "bonfire",
       "MDNlinks": [
-        "String.charCodeAt()",
+        "String.prototype.charCodeAt()",
         "String.fromCharCode()"
       ],
       "isRequired": true,