diff --git a/.changeset/cuddly-ties-run.md b/.changeset/cuddly-ties-run.md
new file mode 100644
index 000000000000..cb3873899841
--- /dev/null
+++ b/.changeset/cuddly-ties-run.md
@@ -0,0 +1,5 @@
+---
+'@rocket.chat/meteor': patch
+---
+
+fix: custom-css injection
diff --git a/apps/meteor/app/ui-master/server/index.js b/apps/meteor/app/ui-master/server/index.js
index f9e335451d74..34a9618d2db6 100644
--- a/apps/meteor/app/ui-master/server/index.js
+++ b/apps/meteor/app/ui-master/server/index.js
@@ -120,8 +120,6 @@ Meteor.startup(() => {
 	})(__meteor_runtime_config__.ROOT_URL_PATH_PREFIX);
 
 	injectIntoHead('base', `<base href="${baseUrl}">`);
-
-	injectIntoHead('css-theme', '');
 });
 
 const renderDynamicCssList = withDebouncing({ wait: 500 })(async () => {