diff --git a/sources/Application/TwigBase/Controller/Controller.php b/sources/Application/TwigBase/Controller/Controller.php
index 6a2dad13b..5fa82ce0d 100644
--- a/sources/Application/TwigBase/Controller/Controller.php
+++ b/sources/Application/TwigBase/Controller/Controller.php
@@ -174,7 +174,7 @@ abstract class Controller
 			}
 			else
 			{
-				$this->DisplayPageNotFound();
+				$this->DisplayBadRequest();
 			}
 		}
 		catch (Exception $e)
@@ -219,6 +219,15 @@ abstract class Controller
 		}
 	}
 
+	/**
+	 * Overridable "page not found" which is more an "operation not found"
+	 */
+	public function DisplayBadRequest()
+	{
+		http_response_code(400);
+		die('Operation not found');
+	}
+
 	/**
 	 * Overridable "page not found" which is more an "operation not found"
 	 */