diff --git a/lib/legacy/class.html b/lib/legacy/class.html
index 4ecd9d33..41f4204b 100644
--- a/lib/legacy/class.html
+++ b/lib/legacy/class.html
@@ -99,7 +99,6 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
       for (let i=0; i<behaviors.length; i++) {
         copyAndFilterProperties(proto, behaviors[i], lifecycle);
       }
-      return lifecycle;
     }
 
     function copyAndFilterProperties(proto, infoOrBehavior, lifecycle) {
@@ -202,7 +201,7 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
       entire list of lifecycle methods, it's important to call `super`.
 
       The element's `properties`, `observers`, and the `_registered` method
-      are controlled via the finalization mechanism provided by `Properties-Mixin`.
+      are controlled via the finalization mechanism provided by `PropertiesMixin`.
 
       `Properties` and `observers` are collected by manually traversing the prototype
       chain and merging. The `_registered` method is called via