diff --git a/packages/backend/src/server/web/views/base.pug b/packages/backend/src/server/web/views/base.pug
index 5bb156f0f4..4238e15f04 100644
--- a/packages/backend/src/server/web/views/base.pug
+++ b/packages/backend/src/server/web/views/base.pug
@@ -37,11 +37,9 @@ html
 		link(rel='stylesheet' href='/assets/fontawesome/css/all.css')
 		link(rel='modulepreload' href=`/assets/${clientEntry.file}`)
 
-		each href in clientEntry.css
-			link(rel='preload' href=`/assets/${href}` as='style')
-
-		each href in clientEntry.css
-			link(rel='preload' href=`/assets/${href}` as='style')
+		if Array.isArray(clientEntry.css)
+			each href in clientEntry.css
+				link(rel='preload' href=`/assets/${href}` as='style')
 
 		title
 			block title