diff --git a/Meta/Lagom/Tools/CodeGenerators/LibWeb/WrapperGenerator.cpp b/Meta/Lagom/Tools/CodeGenerators/LibWeb/WrapperGenerator.cpp
index bb0c7785fd..2bcff977b7 100644
--- a/Meta/Lagom/Tools/CodeGenerators/LibWeb/WrapperGenerator.cpp
+++ b/Meta/Lagom/Tools/CodeGenerators/LibWeb/WrapperGenerator.cpp
@@ -1124,6 +1124,11 @@ static void generate_to_cpp(SourceGenerator& generator, ParameterType& parameter
                     scoped_generator.append(R"~~~(
     else
         @cpp_name@ = JS::js_null();
+)~~~");
+                } else if (optional_default_value->to_int().has_value() || optional_default_value->to_uint().has_value()) {
+                    scoped_generator.append(R"~~~(
+    else
+        @cpp_name@ = JS::Value(@parameter.optional_default_value@);
 )~~~");
                 } else {
                     TODO();