diff --git a/lib/6to5/transformation/transformers/classes.js b/lib/6to5/transformation/transformers/classes.js
index 38534bf63c..cbdf3c7f54 100644
--- a/lib/6to5/transformation/transformers/classes.js
+++ b/lib/6to5/transformation/transformers/classes.js
@@ -232,8 +232,8 @@ Class.prototype.replaceInstanceSuperReferences = function (methodNode) {
       if (!t.isMemberExpression(callee)) return;
       if (callee.object.name !== "super") return;
 
-      //  super.test(); -> ClassName.prototype.MethodName.call(this);
-      callee.property.name = callee.property.name + ".call";
+      // super.test(); -> ClassName.prototype.MethodName.call(this);
+      callee.property = t.memberExpression(callee.property, t.identifier("call"));
       node.arguments.unshift(t.thisExpression());
     }
   });