diff --git a/core/modules/rest/src/RouteProcessor/RestResourceGetRouteProcessorBC.php b/core/modules/rest/src/RouteProcessor/RestResourceGetRouteProcessorBC.php
index 04ff3a7e4b..cf5532615e 100644
--- a/core/modules/rest/src/RouteProcessor/RestResourceGetRouteProcessorBC.php
+++ b/core/modules/rest/src/RouteProcessor/RestResourceGetRouteProcessorBC.php
@@ -52,7 +52,7 @@ public function processOutbound($route_name, Route $route, array &$parameters, B
     if ($route_name_parts[0] === 'rest' && $route_name_parts[count($route_name_parts) - 2] === 'GET' && in_array($route_name_parts[count($route_name_parts) - 1], $this->serializerFormats, TRUE)) {
       array_pop($route_name_parts);
       $redirected_route_name = implode('.', $route_name_parts);
-      trigger_error(sprintf("The '%s' route is deprecated since version 8.5.x and will be removed in 9.0.0. Use the '%s' route instead.", $route_name, $redirected_route_name), E_USER_DEPRECATED);
+      @trigger_error(sprintf("The '%s' route is deprecated since version 8.5.x and will be removed in 9.0.0. Use the '%s' route instead.", $route_name, $redirected_route_name), E_USER_DEPRECATED);
       static::overwriteRoute($route, $this->routeProvider->getRouteByName($redirected_route_name));
     }
   }