diff --git a/doc/ast/spec.md b/doc/ast/spec.md
index ede135b21a..a6656caf27 100644
--- a/doc/ast/spec.md
+++ b/doc/ast/spec.md
@@ -522,7 +522,7 @@ A variable declarator.
 ```js
 interface Decorator <: Node {
   type: "Decorator";
-  value: Expression;
+  expression: Expression;
 }
 ```