diff --git a/packages/babel-generator/src/node/parentheses.js b/packages/babel-generator/src/node/parentheses.js
index 57d57d3fb8..14bc66028c 100644
--- a/packages/babel-generator/src/node/parentheses.js
+++ b/packages/babel-generator/src/node/parentheses.js
@@ -182,7 +182,12 @@ export function FunctionExpression(node: Object, parent: Object): boolean {
     return true;
   }
 
-  return ArrowFunctionExpression(node, parent);
+  // export default (function () {});
+  if (t.isExportDeclaration(parent)) {
+    return true;
+  }
+
+  return UnaryLike(node, parent);
 }
 
 export function ArrowFunctionExpression(node: Object, parent: Object): boolean {