diff --git a/src/Symfony/Component/HttpFoundation/JsonResponse.php b/src/Symfony/Component/HttpFoundation/JsonResponse.php
index 0551e75b17..ae0a8a7abf 100644
--- a/src/Symfony/Component/HttpFoundation/JsonResponse.php
+++ b/src/Symfony/Component/HttpFoundation/JsonResponse.php
@@ -55,8 +55,11 @@ class JsonResponse extends Response
         if ($callback) {
             // taken from http://www.geekality.net/2011/08/03/valid-javascript-identifier/
             $pattern = '/^[$_\p{L}][$_\p{L}\p{Mn}\p{Mc}\p{Nd}\p{Pc}\x{200C}\x{200D}]*+$/u';
-            if (!preg_match($pattern, $callback)) {
-                throw new \InvalidArgumentException('The callback name is not valid.');
+            $parts = explode('.', $callback);
+            foreach ($parts as $part) {
+                if (!preg_match($pattern, $part)) {
+                    throw new \InvalidArgumentException('The callback name is not valid.');
+                }
             }
         }