diff --git a/packages/ast-spec/src/unions/Expression.ts b/packages/ast-spec/src/unions/Expression.ts
index fd1a14b114e..5359dc9c69c 100644
--- a/packages/ast-spec/src/unions/Expression.ts
+++ b/packages/ast-spec/src/unions/Expression.ts
@@ -50,10 +50,8 @@ export type Expression =
   | CallExpression
   | ChainExpression
   | ClassExpression
-  | ClassExpression
   | ConditionalExpression
   | FunctionExpression
-  | FunctionExpression
   | Identifier
   | ImportExpression
   | JSXElement