diff --git a/build/params_calibnet.go b/build/params_calibnet.go
index cdf8dc6e9..e20627919 100644
--- a/build/params_calibnet.go
+++ b/build/params_calibnet.go
@@ -69,7 +69,7 @@ const UpgradeOhSnapHeight = 682006
 // 2022-06-16T17:30:00Z
 const UpgradeSkyrHeight = 1044660
 
-var UpgradeV17Height = abi.ChainEpoch(99999999999999)
+var UpgradeSharkHeight = abi.ChainEpoch(99999999999999)
 
 var SupportedProofTypes = []abi.RegisteredSealProof{
 	abi.RegisteredSealProof_StackedDrg32GiBV1,
diff --git a/build/params_testground.go b/build/params_testground.go
index bcbc32b94..dcdee888d 100644
--- a/build/params_testground.go
+++ b/build/params_testground.go
@@ -107,7 +107,7 @@ var (
 	UpgradeChocolateHeight  abi.ChainEpoch = -16
 	UpgradeOhSnapHeight     abi.ChainEpoch = -17
 	UpgradeSkyrHeight       abi.ChainEpoch = -18
-	UpgradeV17Height        abi.ChainEpoch = -19
+	UpgradeSharkHeight      abi.ChainEpoch = -19
 
 	DrandSchedule = map[abi.ChainEpoch]DrandEnum{
 		0: DrandMainnet,