diff --git a/x/register/keeper/keeper.go b/x/register/keeper/keeper.go
index 3bd0d4fd..b93ce817 100644
--- a/x/register/keeper/keeper.go
+++ b/x/register/keeper/keeper.go
@@ -535,7 +535,7 @@ func (k Keeper) NozSupply(ctx sdk.Context) (remaining, total sdk.Int) {
 	S := k.GetInitialGenesisStakeTotal(ctx)
 	Pt := k.GetTotalUnissuedPrepay(ctx).Amount
 	// total supply = Lt * ( 1 + Pt / S )
-	total = (Pt.ToDec().Quo(S.ToDec()).TruncateInt().Add(sdk.NewInt(1))).Mul(remaining)
+	total = Pt.ToDec().Quo(S.ToDec()).Add(sdk.NewInt(1).ToDec()).Mul(remaining.ToDec()).TruncateInt()
 	return remaining, total
 }