diff --git a/Tests/LibWeb/Text/expected/HTML/cross-origin-WindowProxy-postMessage.txt b/Tests/LibWeb/Text/expected/HTML/cross-origin-WindowProxy-postMessage.txt
new file mode 100644
index 00000000000..7ef22e9a431
--- /dev/null
+++ b/Tests/LibWeb/Text/expected/HTML/cross-origin-WindowProxy-postMessage.txt
@@ -0,0 +1 @@
+PASS
diff --git a/Tests/LibWeb/Text/input/HTML/cross-origin-WindowProxy-postMessage.html b/Tests/LibWeb/Text/input/HTML/cross-origin-WindowProxy-postMessage.html
new file mode 100644
index 00000000000..e0156fcf016
--- /dev/null
+++ b/Tests/LibWeb/Text/input/HTML/cross-origin-WindowProxy-postMessage.html
@@ -0,0 +1,11 @@
+<script src="../include.js"></script>
+<iframe id="i"></iframe>
+<script>
+    asyncTest((done) => {
+        window.onmessage = function() {
+            println("PASS");
+            done();
+        };
+        i.src = "data:text/html,<script>top.postMessage('done', '*');</sc" + "ript>";
+    });
+</script>
diff --git a/Userland/Libraries/LibWeb/HTML/CrossOrigin/AbstractOperations.cpp b/Userland/Libraries/LibWeb/HTML/CrossOrigin/AbstractOperations.cpp
index 1b68072a239..e53ba2e649d 100644
--- a/Userland/Libraries/LibWeb/HTML/CrossOrigin/AbstractOperations.cpp
+++ b/Userland/Libraries/LibWeb/HTML/CrossOrigin/AbstractOperations.cpp
@@ -135,7 +135,7 @@ Optional<JS::PropertyDescriptor> cross_origin_get_own_property_helper(Variant<HT
             if (value->is_function()) {
                 value = JS::NativeFunction::create(
                     realm, [function = JS::make_handle(*value)](auto& vm) {
-                        return JS::call(vm, function.value(), JS::js_undefined());
+                        return JS::call(vm, function.value(), JS::js_undefined(), vm.running_execution_context().arguments.span());
                     },
                     0, "");
             }
@@ -152,7 +152,7 @@ Optional<JS::PropertyDescriptor> cross_origin_get_own_property_helper(Variant<HT
             if (*entry.needs_get) {
                 cross_origin_get = JS::NativeFunction::create(
                     realm, [object_ptr, getter = JS::make_handle(*original_descriptor->get)](auto& vm) {
-                        return JS::call(vm, getter.cell(), object_ptr);
+                        return JS::call(vm, getter.cell(), object_ptr, vm.running_execution_context().arguments.span());
                     },
                     0, "");
             }
@@ -164,7 +164,7 @@ Optional<JS::PropertyDescriptor> cross_origin_get_own_property_helper(Variant<HT
             if (*entry.needs_set) {
                 cross_origin_set = JS::NativeFunction::create(
                     realm, [object_ptr, setter = JS::make_handle(*original_descriptor->set)](auto& vm) {
-                        return JS::call(vm, setter.cell(), object_ptr);
+                        return JS::call(vm, setter.cell(), object_ptr, vm.running_execution_context().arguments.span());
                     },
                     0, "");
             }