diff --git a/Meta/Lagom/Tools/CodeGenerators/LibWeb/BindingsGenerator/IDLGenerators.cpp b/Meta/Lagom/Tools/CodeGenerators/LibWeb/BindingsGenerator/IDLGenerators.cpp
index 46e2da926cc..fdcd1fabbb4 100644
--- a/Meta/Lagom/Tools/CodeGenerators/LibWeb/BindingsGenerator/IDLGenerators.cpp
+++ b/Meta/Lagom/Tools/CodeGenerators/LibWeb/BindingsGenerator/IDLGenerators.cpp
@@ -3906,6 +3906,8 @@ JS_DEFINE_NATIVE_FUNCTION(@class_name@::@attribute.setter_callback@)
     WebIDL::log_trace(vm, "@class_name@::@attribute.setter_callback@");
     [[maybe_unused]] auto& realm = *vm.current_realm();
     auto* impl = TRY(impl_from(vm));
+    if (vm.argument_count() < 1)
+        return vm.throw_completion<JS::TypeError>(JS::ErrorType::BadArgCountOne, "@namespaced_name@ setter");
 
     auto value = vm.argument(0);
 )~~~");
@@ -4033,6 +4035,8 @@ JS_DEFINE_NATIVE_FUNCTION(@class_name@::@attribute.setter_callback@)
 {
     WebIDL::log_trace(vm, "@class_name@::@attribute.setter_callback@");
     auto this_value = vm.this_value();
+    if (vm.argument_count() < 1)
+        return vm.throw_completion<JS::TypeError>(JS::ErrorType::BadArgCountOne, "@namespaced_name@ setter");
     GC::Ptr<Window> window;
     if (this_value.is_object()) {
         if (is<WindowProxy>(this_value.as_object())) {
@@ -4060,6 +4064,8 @@ JS_DEFINE_NATIVE_FUNCTION(@class_name@::@attribute.setter_callback@)
     auto this_value = vm.this_value();
     if (!this_value.is_object() || !is<@fully_qualified_name@>(this_value.as_object()))
         return vm.throw_completion<JS::TypeError>(JS::ErrorType::NotAnObjectOfType, "@namespaced_name@");
+    if (vm.argument_count() < 1)
+        return vm.throw_completion<JS::TypeError>(JS::ErrorType::BadArgCountOne, "@namespaced_name@ setter");
     TRY(this_value.as_object().internal_define_own_property("@attribute.name@", JS::PropertyDescriptor { .value = vm.argument(0), .writable = true }));
     return JS::js_undefined();
 }
@@ -4074,6 +4080,8 @@ JS_DEFINE_NATIVE_FUNCTION(@class_name@::@attribute.setter_callback@)
 {
     WebIDL::log_trace(vm, "@class_name@::@attribute.setter_callback@");
     auto* impl = TRY(impl_from(vm));
+    if (vm.argument_count() < 1)
+        return vm.throw_completion<JS::TypeError>(JS::ErrorType::BadArgCountOne, "@namespaced_name@ setter");
     auto value = vm.argument(0);
 
     auto receiver = TRY(throw_dom_exception_if_needed(vm, [&]() { return impl->@attribute.cpp_name@(); }));