diff --git a/php/controller/showArticle-controller.php b/php/controller/showArticle-controller.php
index f9ede37..8a4d6bc 100644
--- a/php/controller/showArticle-controller.php
+++ b/php/controller/showArticle-controller.php
@@ -16,5 +16,8 @@ if (isset($_GET["id"])){
         $_SESSION["message"] = "internal_error";
         echo "Fehler aufgetreten: " . $e->getMessage();
     }
+}else{
+    $_SESSION["message"] = "article_not_found";
+    echo "article_not_found";
 }
 ?>
\ No newline at end of file