diff --git a/src/binding/bindingAttributeSyntax.js b/src/binding/bindingAttributeSyntax.js
index 7dabc0aff..0e2955331 100755
--- a/src/binding/bindingAttributeSyntax.js
+++ b/src/binding/bindingAttributeSyntax.js
@@ -122,7 +122,6 @@
             }
         }
     }
-    ko.bindingContext.inheritParentVm = inheritParentVm;
 
     // Extend the binding context hierarchy with a new view model object. If the parent context is watching
     // any observables, the new child context will automatically get a dependency on the parent context.
diff --git a/src/binding/defaultBindings/ifIfnotWith.js b/src/binding/defaultBindings/ifIfnotWith.js
index 345b29e89..498afc591 100755
--- a/src/binding/defaultBindings/ifIfnotWith.js
+++ b/src/binding/defaultBindings/ifIfnotWith.js
@@ -24,7 +24,7 @@ function makeWithIfBinding(bindingKey, isWith, isNot) {
                         isWith ?
                             bindingContext['createChildContext'](valueAccessor) :
                             ifCondition.isActive() ?
-                                new ko.bindingContext(ko.bindingContext.inheritParentVm, bindingContext, null, function() { ifCondition(); }) :
+                                bindingContext['extend'](function() { ifCondition(); return null; }) :
                                 bindingContext,
                         element);
                 } else {