diff --git a/Libraries/LibJS/AST.h b/Libraries/LibJS/AST.h
index 8578a8530e..575e501139 100644
--- a/Libraries/LibJS/AST.h
+++ b/Libraries/LibJS/AST.h
@@ -56,7 +56,7 @@ public:
 
 class ErrorStatement final : public Statement {
 public:
-    Value execute(Interpreter&) const { return js_undefined(); }
+    Value execute(Interpreter&) const override { return js_undefined(); }
     const char* class_name() const override { return "ErrorStatement"; }
 };
 
@@ -147,7 +147,7 @@ public:
 
 class ErrorExpression final : public Expression {
 public:
-    Value execute(Interpreter&) const { return js_undefined(); }
+    Value execute(Interpreter&) const override { return js_undefined(); }
     const char* class_name() const override { return "ErrorExpression"; }
 };