diff --git a/premix/configuration.nim b/premix/configuration.nim
index 247e38ba1..c8ba62fd8 100644
--- a/premix/configuration.nim
+++ b/premix/configuration.nim
@@ -1,5 +1,5 @@
 import stint, os, parseopt, strutils
-from ../nimbus/config import getDefaultDataDir, ConfigStatus, processInteger
+from ../nimbus/config import getDefaultDataDir, ConfigStatus, processInteger, PublicNetwork
 
 export ConfigStatus
 
@@ -9,6 +9,7 @@ type
     head*: Uint256
     maxBlocks*: int
     numCommits*: int
+    netId*: PublicNetwork
 
 var premixConfig {.threadvar.}: PremixConfiguration
 
@@ -23,6 +24,7 @@ proc initConfiguration(): PremixConfiguration =
   result.head = 0.u256
   result.maxBlocks = 0
   result.numCommits = 128
+  result.netId = MainNet
 
 proc getConfiguration*(): PremixConfiguration =
   if isNil(premixConfig):
@@ -36,6 +38,15 @@ proc processU256(val: string, o: var Uint256): ConfigStatus =
     o = parse(val, Uint256)
   result = Success
 
+proc processNetId(val: string, o: var PublicNetwork): ConfigStatus =
+  case val.toLowerAscii()
+  of "main": o = MainNet
+  of "morden": o = MordenNet
+  of "ropsten": o = RopstenNet
+  of "rinkeby": o = RinkebyNet
+  of "goerli": o = GoerliNet
+  of "kovan": o = KovanNet
+
 template checkArgument(fun, o: untyped) =
   ## Checks if arguments got processed successfully
   var res = (fun)(value, o)
@@ -72,6 +83,8 @@ proc processArguments*(msg: var string): ConfigStatus =
       of "numcommits":
         checkArgument processInteger, config.numCommits
         config.numCommits = max(config.numCommits, 512)
+      of "netid":
+        checkArgument processNetId, config.netId
       else:
         msg = "Unknown option " & key
         if value.len > 0: msg = msg & " : " & value
diff --git a/premix/persist.nim b/premix/persist.nim
index 8aaf1606f..3fde796f6 100644
--- a/premix/persist.nim
+++ b/premix/persist.nim
@@ -3,7 +3,7 @@
 import
   eth/[common, rlp], stint,
   chronicles, downloader, configuration,
-  ../nimbus/errors
+  ../nimbus/[errors, config]
 
 import
   eth/trie/[hexary, db],
@@ -34,10 +34,10 @@ proc main() =
   # 52029 first block with receipts logs
   # 66407 failed transaction
 
-  let conf = getConfiguration()
+  let conf = configuration.getConfiguration()
   let db = newChainDb(conf.dataDir)
   let trieDB = trieDB db
-  let chainDB = newBaseChainDB(trieDB, false)
+  let chainDB = newBaseChainDB(trieDB, false, conf.netId)
 
   # move head to block number ...
   if conf.head != 0.u256:
@@ -93,7 +93,7 @@ when isMainModule:
   var message: string
 
   ## Processing command line arguments
-  if processArguments(message) != Success:
+  if configuration.processArguments(message) != Success:
     echo message
     quit(QuitFailure)
   else: