diff --git a/core/blockchain.go b/core/blockchain.go
index 8d64d5bc7a..4e1bf2b317 100644
--- a/core/blockchain.go
+++ b/core/blockchain.go
@@ -2820,7 +2820,7 @@ func (bc *BlockChain) StateSizer() *state.SizeTracker {
 	return bc.stateSizer
 }
 
-// FirstStateBlock returns the first available state block number that is stored in the database.
-func (bc *BlockChain) FirstStateBlock() (uint64, error) {
-	return bc.triedb.FirstStateBlock()
+// FrezzerTailBlock returns the block number of the oldest state in the freezer.
+func (bc *BlockChain) FreezerTailBlock() (uint64, error) {
+	return bc.triedb.FreezerTailBlock()
 }
diff --git a/triedb/database.go b/triedb/database.go
index 2c12a8abce..62d66be2e8 100644
--- a/triedb/database.go
+++ b/triedb/database.go
@@ -385,12 +385,11 @@ func (db *Database) SnapshotCompleted() bool {
 	return pdb.SnapshotCompleted()
 }
 
-// FirstStateBlock returns the first available state block number that is stored in the database.
-func (db *Database) FirstStateBlock() (uint64, error) {
+// FrezzerTailBlock returns the block number of the oldest state in the freezer.
+func (db *Database) FreezerTailBlock() (uint64, error) {
 	pdb, ok := db.backend.(*pathdb.Database)
 	if !ok {
-		// Ignore in hash scheme
 		return 0, nil
 	}
-	return pdb.FirstStateBlock()
+	return pdb.FrezzerTailBlock()
 }
diff --git a/triedb/pathdb/database.go b/triedb/pathdb/database.go
index 08cd6cc045..40fe19f566 100644
--- a/triedb/pathdb/database.go
+++ b/triedb/pathdb/database.go
@@ -693,8 +693,8 @@ func (db *Database) SnapshotCompleted() bool {
 	return db.tree.bottom().genComplete()
 }
 
-// FirstStateBlock returns the block number of the oldest state in the freezer.
-func (db *Database) FirstStateBlock() (uint64, error) {
+// FrezzerTailBlock returns the block number of the oldest state in the freezer.
+func (db *Database) FrezzerTailBlock() (uint64, error) {
 	freezer := db.stateFreezer
 	if freezer == nil {
 		return 0, errors.New("freezer is not available")