diff --git a/pkg/snapshot/config.go b/pkg/snapshot/config.go
index ba7a52e..d329623 100644
--- a/pkg/snapshot/config.go
+++ b/pkg/snapshot/config.go
@@ -107,8 +107,11 @@ func (c *Config) Init(mode SnapshotMode) error {
 	viper.BindEnv(ETHDB_ANCIENT_TOML, ETHDB_ANCIENT)
 	viper.BindEnv(ETHDB_PATH_TOML, ETHDB_PATH)
 
-	c.Eth.AncientDBPath = viper.GetString(ETHDB_ANCIENT_TOML)
 	c.Eth.DBPath = viper.GetString(ETHDB_PATH_TOML)
+	c.Eth.AncientDBPath = viper.GetString(ETHDB_ANCIENT_TOML)
+	if len(c.Eth.AncientDBPath) == 0 {
+		c.Eth.AncientDBPath = c.Eth.DBPath + "/ancient"
+	}
 
 	switch mode {
 	case FileSnapshot: