1 files changed, 3 insertions, 0 deletions
diff --git a/structs.go b/structs.go
index 53c058a..8e3bc19 100644
--- a/structs.go
+++ b/structs.go
@@ -7,6 +7,8 @@ package tree
 */
 
 import (
+	"sync"
+
 	"go.wit.com/lib/protobuf/guipb"
 	"go.wit.com/widget"
 )
@@ -18,6 +20,7 @@ import (
 var treeRoot *Node
 
 type TreeInfo struct {
+	sync.Mutex                       // a lock around the tree to serialize access
 	ok           bool                // indicates the plugin actually initialized
 	PluginName   string              // used to identify the plugin
 	config       *ToolkitConfigs     // protobuf of plugin settings