diff --git a/upload/system/engine/router.php b/upload/system/engine/router.php
index 8dc6e4659..a74622aa2 100644
--- a/upload/system/engine/router.php
+++ b/upload/system/engine/router.php
@@ -80,7 +80,7 @@ private function execute(Action $action) {
 			return $result;
 		}
 
-		if ($result instanceof Exception) {
+		if ($result instanceof \Exception) {
 			$action = $this->error;
 
 			$this->error = null;