diff --git a/CheckListBox.md b/CheckListBox.md
index 3fb2703..1fa631b 100644
--- a/CheckListBox.md
+++ b/CheckListBox.md
@@ -1,5 +1,5 @@
 # CheckListBox
-Derives from Xceed.Wpf.Toolkit.Primitives.Selector
+Derives from Xceed.Wpf.Toolkit.Primitives.SelectAllSelector
 
 The CheckListBox control is a ListBox in which each item is represented with a CheckBox. The CheckBox.IsSelected can be data bound using the SelectedMemberPath property. The CheckListBox also provides a Command property which will execute every time an item is checked/unchecked. The CommandParameter is the recently checked/unchecked item.