diff --git a/AST.md b/AST.md
index 16af254..2f7cd16 100644
--- a/AST.md
+++ b/AST.md
@@ -95,7 +95,7 @@ Opening element ("tag") may contain attributes:
 interface JSXAttribute <: Node {
     type: "JSXAttribute";
     name: JSXIdentifier | JSXNamespacedName;
-    value: Literal | JSXExpressionContainer | JSXElement | JSXFragment | null;
+    value: Literal | JSXExpressionContainer | JSXElement | JSXFragment | JSXIdentifier | null;
 }
 
 interface JSXSpreadAttribute <: SpreadElement {
diff --git a/README.md b/README.md
index e195e25..a958831 100644
--- a/README.md
+++ b/README.md
@@ -100,6 +100,7 @@ JSXSpreadAttribute :
 JSXAttribute :

 
 - JSXAttributeName JSXAttributeInitializer<sub>opt</sub>
+- `+` JSXIdentifier
 
 JSXAttributeName :