diff --git a/acorn.js b/acorn.js
index 4212ac3d7e..30b87d6e5a 100644
--- a/acorn.js
+++ b/acorn.js
@@ -2412,7 +2412,7 @@
   function parseClass(node, isStatement) {
     next();
     node.id = tokType === _name ? parseIdent() : isStatement ? unexpected() : null;
-    node.superClass = eat(_extends) ? parseExpression() : null;
+    node.superClass = eat(_extends) ? parseExprSubscripts() : null;
     var classBody = startNode();
     classBody.body = [];
     expect(_braceL);