diff --git a/router/router.go b/router/router.go
index 9bd9be260..3111836f9 100644
--- a/router/router.go
+++ b/router/router.go
@@ -197,7 +197,7 @@ func Start() error {
 	http.HandleFunc("/api/admin/config/externalactions", middleware.RequireAdminAuth(admin.SetExternalActions))
 
 	// set custom style css
-	http.HandleFunc("api/admin/config/customstyles", middleware.RequireAdminAuth(admin.SetCustomStyles))
+	http.HandleFunc("/api/admin/config/customstyles", middleware.RequireAdminAuth(admin.SetCustomStyles))
 
 	port := config.WebServerPort