diff --git a/cli/multisig.go b/cli/multisig.go
index 8abae5182..e18c48b8f 100644
--- a/cli/multisig.go
+++ b/cli/multisig.go
@@ -1178,7 +1178,7 @@ var msigLockProposeCmd = &cli.Command{
 		params, actErr := actors.SerializeParams(&msig2.LockBalanceParams{
 			StartEpoch:     abi.ChainEpoch(start),
 			UnlockDuration: abi.ChainEpoch(duration),
-			Amount:         abi.NewTokenAmount(amount.Int64()),
+			Amount:         big.Int(amount),
 		})
 
 		if actErr != nil {