diff --git a/lib/parse.js b/lib/parse.js
index 0a6072af..a8482135 100644
--- a/lib/parse.js
+++ b/lib/parse.js
@@ -1794,7 +1794,7 @@ function parse($TEXT, options) {
     var maybe_assign = function(no_in) {
         var start = S.token;
 
-        if (start.value == "(" && peek().value == ")") {
+        if (start.value == "(" && start.type == "punc" && peek().value == ")") {
             next();
             next();
             return arrow_function([]);