diff --git a/acorn.js b/acorn.js
index 536605abc5..0be40874b3 100644
--- a/acorn.js
+++ b/acorn.js
@@ -3052,7 +3052,6 @@
       node.typeParameters = parseTypeParameterDeclaration();
     }
     node.superClass = eat(_extends) ? parseMaybeAssign(false, true) : null;
-    if (node.superClass) checkLVal(node.superClass);
     if (node.superClass && tokType === _lt) {
       node.superTypeParameters = parseTypeParameterInstantiation();
     }
diff --git a/package.json b/package.json
index 9df29bd4da..61f63257f9 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "name": "acorn-6to5",
   "description": "Acorn fork used by 6to5",
   "main": "acorn.js",
-  "version": "0.11.1-4",
+  "version": "0.11.1-5",
   "maintainers": [
     {
       "name": "Marijn Haverbeke",