diff --git a/trie/trienode/proof.go b/trie/trienode/proof.go
index 01a07c05b0..ac970e5c70 100644
--- a/trie/trienode/proof.go
+++ b/trie/trienode/proof.go
@@ -85,9 +85,11 @@ func (db *ProofSet) Get(key []byte) ([]byte, error) {
 }
 
 // Has returns true if the node set contains the given key
-func (db *ProofSet) Has(key []byte) (bool, error) {
-	_, err := db.Get(key)
-	return err == nil, nil
+    db.lock.RLock()
+	defer db.lock.RUnlock()
+
+	_, ok := db.nodes[string(key)]
+	return ok, nil
 }
 
 // KeyCount returns the number of nodes in the set