diff --git a/ast/spec.md b/ast/spec.md
index 9d187eb4a7..39d20a6de9 100644
--- a/ast/spec.md
+++ b/ast/spec.md
@@ -34,7 +34,8 @@ These are the core Babylon AST node types.
     - [DoWhileStatement](#dowhilestatement)
     - [ForStatement](#forstatement)
     - [ForInStatement](#forinstatement)
-  - [ForOfStatement](#forofstatement)
+    - [ForOfStatement](#forofstatement)
+    - [ForAwaitStatement](#forawaitstatement)
 - [Declarations](#declarations)
   - [FunctionDeclaration](#functiondeclaration)
   - [VariableDeclaration](#variabledeclaration)
@@ -480,6 +481,16 @@ interface ForOfStatement <: ForInStatement {
 }
 ```
 
+A `for`/`await` statement.
+
+## ForAwaitStatement
+
+```js
+interface ForAwaitStatement <: ForInStatement {
+  type: "ForAwaitStatement";
+}
+```
+
 # Declarations
 
 ```js