diff --git a/src/js/popup.js b/src/js/popup.js
index bc53f83..9c7e3b0 100644
--- a/src/js/popup.js
+++ b/src/js/popup.js
@@ -1093,7 +1093,7 @@ Logic.registerPanel(P_CONTAINER_EDIT, {
     Logic.setOrRemoveAssignment(tabId, fullURL, userContextId, false);
   },
 
-  checkurl(url){
+  checkUrl(url){
     // append "https://" if protocol not found
     const regexWww = /.*www\..*/g;
     const foundWww = url.match(regexWww);