diff --git a/packages/trie-db/src/types.ts b/packages/trie-db/src/types.ts
index 8be33991d..756cdf6e2 100644
--- a/packages/trie-db/src/types.ts
+++ b/packages/trie-db/src/types.ts
@@ -34,4 +34,6 @@ export type NodeNotEmpty = NodeKv | NodeBranch;
 export type Node = NodeEmpty | NodeNotEmpty;
 
 export interface TrieDb extends TxDb<Uint8Array> {
+  getRoot (): Uint8Array;
+  setRoot (rootHash: Uint8Array): void;
 }