diff --git a/addNode.go b/addNode.go
index 416dd3c..544792f 100644
--- a/addNode.go
+++ b/addNode.go
@@ -6,8 +6,11 @@ import (
 )
 
 func (me *TreeInfo) AddNode(a *widget.Action) *Node {
-	// me.Lock()
-	// defer me.Unlock()
+	if me.TryLock() {
+		defer me.Unlock()
+	} else {
+		log.Info("TREE: mutex lock was already held before AddNode()")
+	}
 	return AddNode(a)
 }