diff --git a/first-network/byfn.sh b/first-network/byfn.sh
index 41ed1b8a8e..d2eb65929f 100755
--- a/first-network/byfn.sh
+++ b/first-network/byfn.sh
@@ -383,7 +383,7 @@ function generateChannelArtifacts() {
   # Note: For some unknown reason (at least for now) the block file can't be
   # named orderer.genesis.block or the orderer will fail to launch!
   set -x
-  configtxgen -profile TwoOrgsOrdererGenesis -outputBlock ./channel-artifacts/genesis.block
+  configtxgen -profile TwoOrgsOrdererGenesis -channelID byfn-sys-channel -outputBlock ./channel-artifacts/genesis.block
   res=$?
   set +x
   if [ $res -ne 0 ]; then