diff --git a/Classes/Controller/ToolboxController.php b/Classes/Controller/ToolboxController.php
index 7c1224dd8..3656ae136 100644
--- a/Classes/Controller/ToolboxController.php
+++ b/Classes/Controller/ToolboxController.php
@@ -396,7 +396,7 @@ private function renderImageManipulationTool(): void
     private function renderModelDownloadTool(): void
     {
         $modelUrl = $this->getModelUrl();
-        if ($modelUrl) {
+        if ($modelUrl === '') {
             $this->logger->debug("Model URL could not be determined");
             return;
         }