diff --git a/src/Perspex.Controls/Primitives/SelectingItemsControl.cs b/src/Perspex.Controls/Primitives/SelectingItemsControl.cs
index 9ec708dd6b..f6e405a24a 100644
--- a/src/Perspex.Controls/Primitives/SelectingItemsControl.cs
+++ b/src/Perspex.Controls/Primitives/SelectingItemsControl.cs
@@ -62,7 +62,7 @@ namespace Perspex.Controls.Primitives
             PerspexProperty.RegisterDirect<SelectingItemsControl, object>(
                 nameof(SelectedItem),
                 o => o.SelectedItem,
-                (o, v) => o.SelectedItem = v);
+                (o, v) => o.SelectedItem = v, BindingMode.TwoWay);
 
         /// <summary>
         /// Defines the <see cref="SelectedItems"/> property.
diff --git a/src/Perspex.Controls/Primitives/ToggleButton.cs b/src/Perspex.Controls/Primitives/ToggleButton.cs
index 8d464464ec..c0aedf00ba 100644
--- a/src/Perspex.Controls/Primitives/ToggleButton.cs
+++ b/src/Perspex.Controls/Primitives/ToggleButton.cs
@@ -3,6 +3,7 @@
 
 using System;
 using Perspex.Interactivity;
+using Perspex.Data;
 
 namespace Perspex.Controls.Primitives
 {
@@ -12,7 +13,7 @@ namespace Perspex.Controls.Primitives
             PerspexProperty.RegisterDirect<ToggleButton, bool>(
                 "IsChecked",
                 o => o.IsChecked,
-                (o,v) => o.IsChecked = v);
+                (o,v) => o.IsChecked = v, BindingMode.TwoWay);
 
         private bool _isChecked;
 
diff --git a/src/Perspex.Controls/TreeViewItem.cs b/src/Perspex.Controls/TreeViewItem.cs
index fe74ebfd93..d5369840ad 100644
--- a/src/Perspex.Controls/TreeViewItem.cs
+++ b/src/Perspex.Controls/TreeViewItem.cs
@@ -20,7 +20,7 @@ namespace Perspex.Controls
         /// Defines the <see cref="IsExpanded"/> property.
         /// </summary>
         public static readonly StyledProperty<bool> IsExpandedProperty =
-            PerspexProperty.Register<TreeViewItem, bool>("IsExpanded");
+            PerspexProperty.Register<TreeViewItem, bool>("IsExpanded", default(bool), false, Data.BindingMode.TwoWay);
 
         /// <summary>
         /// Defines the <see cref="IsSelected"/> property.
@@ -30,7 +30,7 @@ namespace Perspex.Controls
 
         private static readonly ITemplate<IPanel> DefaultPanel =
             new FuncTemplate<IPanel>(() => new StackPanel
-            {
+            {                
                 [KeyboardNavigation.DirectionalNavigationProperty] = KeyboardNavigationMode.Continue,
             });
 
@@ -40,7 +40,7 @@ namespace Perspex.Controls
         /// Initializes static members of the <see cref="TreeViewItem"/> class.
         /// </summary>
         static TreeViewItem()
-        {
+        {            
             SelectableMixin.Attach<TreeViewItem>(IsSelectedProperty);
             FocusableProperty.OverrideDefaultValue<TreeViewItem>(true);
             ItemsPanelProperty.OverrideDefaultValue<TreeViewItem>(DefaultPanel);