1 files changed, 4 insertions, 2 deletions
diff --git a/widget.go b/widget.go
index 9626861..9b3bc5f 100644
--- a/widget.go
+++ b/widget.go
@@ -109,7 +109,7 @@ func (w *guiWidget) SetVisible(b bool) {
 func addDropdown() *tree.Node {
 	n := new(tree.Node)
 	n.WidgetType = widget.Flag
-	n.WidgetId = -2
+	n.WidgetId = 2222
 	n.ParentId = 0
 
 	// store the internal toolkit information
@@ -128,7 +128,9 @@ func addDropdown() *tree.Node {
 
 	// add this new widget on the binary tree
 	tk.parent = me.treeRoot.TK.(*guiWidget)
-	if tk.parent != nil {
+	if tk.parent == nil {
+		panic("addDropdown() didn't get treeRoot guiWidget")
+	} else {
 		tk.parent.children = append(tk.parent.children, tk)
 	}