diff --git a/src/Messaging/Frame.php b/src/Messaging/Frame.php
index 40f9eb2..360b70f 100644
--- a/src/Messaging/Frame.php
+++ b/src/Messaging/Frame.php
@@ -74,7 +74,7 @@ class Frame implements FrameInterface {
      * @param callable<\UnderflowException> $ufExceptionFactory
      */
     public function __construct($payload = null, $final = true, $opcode = 1, callable $ufExceptionFactory = null) {
-        $this->ufeg = $ufExceptionFactory ?: function($msg = '') {
+        $this->ufeg = $ufExceptionFactory ?: static function($msg = '') {
             return new \UnderflowException($msg);
         };