diff --git a/services/web/frontend/js/features/source-editor/extensions/class-highlighter.ts b/services/web/frontend/js/features/source-editor/extensions/class-highlighter.ts
index a018ab6392..895b29b4a9 100644
--- a/services/web/frontend/js/features/source-editor/extensions/class-highlighter.ts
+++ b/services/web/frontend/js/features/source-editor/extensions/class-highlighter.ts
@@ -23,6 +23,7 @@ export const classHighlighter = tagHighlighter([
     tag: [tags.regexp, tags.escape, tags.special(tags.string)],
     class: 'tok-string2',
   },
+  { tag: tags.function(tags.variableName), class: 'tok-function' },
   { tag: tags.variableName, class: 'tok-variableName' },
   { tag: tags.local(tags.variableName), class: 'tok-variableName tok-local' },
   {