diff --git a/common/dbutils/bucket.go b/common/dbutils/bucket.go
index 2bae48a1f6300471ea47a8bef11e987e7b9254ad..b40f9ae3d71ee61b0f187e429c1f0272e4cfd30f 100644
--- a/common/dbutils/bucket.go
+++ b/common/dbutils/bucket.go
@@ -48,7 +48,7 @@ const PlainStateBucketOld1 = "PLAIN-CST"
 //PlainContractCodeBucket -
 //key - address+incarnation
 //value - code hash
-var PlainContractCodeBucket = "PLAIN-contractCode"
+const PlainContractCodeBucket = "PLAIN-contractCode"
 
 /*
 AccountChangeSetBucket and StorageChangeSetBucket - of block N store values of state before block N changed them.
@@ -74,8 +74,8 @@ StorageChangeSetBucket:
 	key - blockNum_u64 + address + incarnation_u64
 	value - plain_storage_key + value
 */
-var AccountChangeSetBucket = "PLAIN-ACS"
-var StorageChangeSetBucket = "PLAIN-SCS"
+const AccountChangeSetBucket = "PLAIN-ACS"
+const StorageChangeSetBucket = "PLAIN-SCS"
 
 const (