diff --git a/homepage/knowledge/cat.html b/homepage/knowledge/cat.html
index 6a607ad..8810136 100644
--- a/homepage/knowledge/cat.html
+++ b/homepage/knowledge/cat.html
@@ -27,11 +27,11 @@ window.load_highlighting = function(language){
 		document.body.appendChild(script);
 		window.is_hljs_here = 1;
 	}
-	if(window.ishighlighted.indexOf(language) == -1){
+	if(window.is_highlighted.indexOf(language) == -1){
 		script = document.createElement('script');
 		script.src = "https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.0.1/languages/" + language + ".min.js";
 		document.body.appendChild(script);
-		window.ishighlighted.push(language);
+		window.is_highlighted.push(language);
 	}
 }
 </SCRIPT>