diff --git a/common/dbutils/bucket.go b/common/dbutils/bucket.go
index 87c57de6a1a62a43b9405ff9a91b525d807d674e..00980b5b3e0a8997bfcbcc66c8dc4af8d14c0acd 100644
--- a/common/dbutils/bucket.go
+++ b/common/dbutils/bucket.go
@@ -10,7 +10,8 @@ import (
 
 // Buckets
 var (
-	// "Plain State". The same as CurrentStateBucket, but the keys arent' hashed.
+	// "Plain State" - state where keys arent' hashed. "CurrentState" - same, but keys are hashed. "PlainState" used for blocks execution. "CurrentState" used mostly for Merkle root calculation.
+	// "incarnation" - uint64 number - how much times given account was SelfDestruct'ed.
 
 	/*
 		Logical layout: