diff --git a/assets.go b/assets.go
index 95c4f8be5..e5d5ebe8a 100644
--- a/assets.go
+++ b/assets.go
@@ -77,7 +77,7 @@ func loadTemplate(t *template.Template, path string) *template.Template {
 	return t
 }
 
-func serverFileOrEmpty(path string, contentType string, c *gin.Context) {
+func serveFileOr404(path string, contentType string, c *gin.Context) {
 	if path == "" {
 		c.Data(200, contentType, nil)
 		return
diff --git a/main.go b/main.go
index 503d53bfe..4d0fca3e9 100644
--- a/main.go
+++ b/main.go
@@ -88,10 +88,10 @@ func setupRouter(router *gin.Engine) {
 	router.GET(getViewURL("/labelValues.json"), knownLabelValues)
 
 	router.GET(getViewURL("/custom.css"), func(c *gin.Context) {
-		serverFileOrEmpty(config.Config.Custom.CSS, "text/css", c)
+		serveFileOr404(config.Config.Custom.CSS, "text/css", c)
 	})
 	router.GET(getViewURL("/custom.js"), func(c *gin.Context) {
-		serverFileOrEmpty(config.Config.Custom.JS, "application/javascript", c)
+		serveFileOr404(config.Config.Custom.JS, "application/javascript", c)
 	})
 
 	router.NoRoute(notFound)