diff --git a/Meta/Lagom/Tools/CodeGenerators/LibWeb/WrapperGenerator.cpp b/Meta/Lagom/Tools/CodeGenerators/LibWeb/WrapperGenerator.cpp
index 9ca2a40ef6..e093743be5 100644
--- a/Meta/Lagom/Tools/CodeGenerators/LibWeb/WrapperGenerator.cpp
+++ b/Meta/Lagom/Tools/CodeGenerators/LibWeb/WrapperGenerator.cpp
@@ -1079,7 +1079,7 @@ static void generate_to_cpp(SourceGenerator& generator, ParameterType& parameter
 )~~~");
         } else {
             scoped_generator.append(R"~~~(
-    JS::Value @cpp_name@;
+    JS::Value @cpp_name@ = JS::js_undefined();
     if (!@js_name@@js_suffix@.is_undefined())
         @cpp_name@ = @js_name@@js_suffix@;
 )~~~");