diff --git a/CheckComboBox.md b/CheckComboBox.md
index d90acb3..5b0826c 100644
--- a/CheckComboBox.md
+++ b/CheckComboBox.md
@@ -12,7 +12,7 @@ CheckComboBox is a combo box in which the items in the dropdown are preceded by
                              DisplayMemberPath="Color"
                              ValueMemberPath="Level"
                              SelectedValue="{Binding SelectedValue}"
-                             SelectedItems="{Binding SelectedItems}" />
+                             SelectedItemsOverride="{Binding SelectedItems}" />
 ```
 
 ### Properties