diff --git a/lizmap/modules/lizmap/controllers/edition.classic.php b/lizmap/modules/lizmap/controllers/edition.classic.php
index 3d16e8ebd2..d05b147a3e 100644
--- a/lizmap/modules/lizmap/controllers/edition.classic.php
+++ b/lizmap/modules/lizmap/controllers/edition.classic.php
@@ -1483,7 +1483,7 @@ public function editableFeatures()
 
         $rep->setContentCallback(function () use ($inputGenerator) {
             $output = Psr7\Utils::streamFor(fopen('php://output', 'w+'));
-            $input = Psr7\Utils::streamFor($inputGenerator);
+            $input = Psr7\Utils::streamFor($inputGenerator());
             Psr7\Utils::copyToStream($input, $output);
         });