diff --git a/Userland/Libraries/LibJS/Runtime/ExecutionContext.h b/Userland/Libraries/LibJS/Runtime/ExecutionContext.h
index a102982aaa..6cf0c1e7b1 100644
--- a/Userland/Libraries/LibJS/Runtime/ExecutionContext.h
+++ b/Userland/Libraries/LibJS/Runtime/ExecutionContext.h
@@ -8,6 +8,7 @@
 #pragma once
 
 #include <AK/FlyString.h>
+#include <AK/WeakPtr.h>
 #include <LibJS/Forward.h>
 #include <LibJS/Runtime/MarkedValueList.h>
 #include <LibJS/Runtime/PrivateEnvironment.h>