diff --git a/src/Routing/QueryRouteEnhancer.php b/src/Routing/QueryRouteEnhancer.php
index f3b45f16a..2b0bca8be 100644
--- a/src/Routing/QueryRouteEnhancer.php
+++ b/src/Routing/QueryRouteEnhancer.php
@@ -71,7 +71,7 @@ protected function extractBody(Request $request) {
       $values = array_merge($values, JsonHelper::decodeParams($content));
     }
 
-    if (stripos($request->headers->get('content-type'), 'multipart/form-data') !== FALSE) {
+    if (stripos($request->headers->get('content-type') ?? '', 'multipart/form-data') !== FALSE) {
       return $this->extractMultipart($request, $values);
     }