diff --git a/Userland/Libraries/LibJS/Contrib/Test262/$262Object.cpp b/Userland/Libraries/LibJS/Contrib/Test262/$262Object.cpp
index e7c588a30a..41439b3ec8 100644
--- a/Userland/Libraries/LibJS/Contrib/Test262/$262Object.cpp
+++ b/Userland/Libraries/LibJS/Contrib/Test262/$262Object.cpp
@@ -5,6 +5,7 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
+#include <AK/TypeCasts.h>
 #include <LibJS/Contrib/Test262/$262Object.h>
 #include <LibJS/Contrib/Test262/AgentObject.h>
 #include <LibJS/Contrib/Test262/GlobalObject.h>