diff --git a/doc/ast/spec.md b/doc/ast/spec.md
index 4d254cb46d..8b360898c7 100644
--- a/doc/ast/spec.md
+++ b/doc/ast/spec.md
@@ -523,7 +523,7 @@ A variable declarator.
 ```js
 interface Decorator <: Node {
   type: "Decorator";
-  value: Expression;
+  expression: Expression;
 }
 ```