diff --git a/vochain/state/trees.go b/vochain/state/trees.go
index 2515df6b9..b98742e54 100644
--- a/vochain/state/trees.go
+++ b/vochain/state/trees.go
@@ -46,6 +46,8 @@ type treeTxWithMutex struct {
 // MainTreeView is a thread-safe function to obtain a pointer to the last
 // opened mainTree as a TreeView.
 func (v *State) MainTreeView() *statedb.TreeView {
+	v.tx.RLock()
+	defer v.tx.RUnlock()
 	return v.mainTreeViewValue.Load()
 }