LibJS: Constructor function's "prototype" property should be writable

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1 files changed, 1 insertions, 1 deletions

diff --git a/Libraries/LibJS/AST.cpp b/Libraries/LibJS/AST.cpp
index a78ce9192f..a6cb719120 100644
--- a/Libraries/LibJS/AST.cpp
+++ b/Libraries/LibJS/AST.cpp
@@ -759,7 +759,7 @@ Value ClassExpression::execute(Interpreter& interpreter, GlobalObject& global_ob
         prototype->define_property(vm.names.constructor, class_constructor, 0);
         if (interpreter.exception())
             return {};
-        class_constructor->define_property(vm.names.prototype, prototype, 0);
+        class_constructor->define_property(vm.names.prototype, prototype, Attribute::Writable);
         if (interpreter.exception())
             return {};
         class_constructor->set_prototype(super_constructor.is_null() ? global_object.function_prototype() : &super_constructor.as_object());