diff --git a/uppsrc/GridCtrl/GridBase.cpp b/uppsrc/GridCtrl/GridBase.cpp
index 53f68e8d8..c255f1e7e 100644
--- a/uppsrc/GridCtrl/GridBase.cpp
+++ b/uppsrc/GridCtrl/GridBase.cpp
@@ -242,6 +242,13 @@ static void MakeOption(One<Ctrl>& ctrl)
 	ctrl->WantFocus();
 }
 
+static void MakeThreeStateOption(One<Ctrl>& ctrl)
+{
+	ctrl.Create<Option>().ThreeState().ShowLabel(false);
+	ctrl->SetData(0);
+	ctrl->WantFocus();
+}
+
 GridCtrl::ItemRect& GridCtrl::ItemRect::Ctrls(Callback1<One<Ctrl>&> _factory)
 {
 	if(!(*edits)[id].factory)
@@ -262,6 +269,11 @@ GridCtrl::ItemRect& GridCtrl::ItemRect::Option()
 	return Ctrls(MakeOption).CtrlAlignHorzPos().CtrlAlignVertPos();
 }
 
+GridCtrl::ItemRect& GridCtrl::ItemRect::ThreeStateOption()
+{
+	return Ctrls(MakeThreeStateOption).CtrlAlignHorzPos().CtrlAlignVertPos();
+}
+
 GridCtrl::Item& GridCtrl::Item::Editable(bool b)
 {
 	editable = b;
diff --git a/uppsrc/GridCtrl/GridCtrl.h b/uppsrc/GridCtrl/GridCtrl.h
index 7458e67bc..868ee645b 100644
--- a/uppsrc/GridCtrl/GridCtrl.h
+++ b/uppsrc/GridCtrl/GridCtrl.h
@@ -735,6 +735,7 @@ class GridCtrl : public Ctrl
 				template<class T> ItemRect&  Ctrls()             { return Ctrls(DefaultCtrlFactory<T>()); }
 				ItemRect& NoCtrls();
 				ItemRect& Option();
+				ItemRect& ThreeStateOption();
 
 				ItemRect& Editable(bool b);
 				ItemRect& NoEditable();