diff --git a/decimal.go b/decimal.go
index ef2bacb..2cf6bc0 100644
--- a/decimal.go
+++ b/decimal.go
@@ -1406,9 +1406,7 @@ func (d Decimal) IntPart() int64 {
 // BigInt returns integer component of the decimal as a BigInt.
 func (d Decimal) BigInt() *big.Int {
 	scaledD := d.rescale(0)
-	i := &big.Int{}
-	i.SetString(scaledD.String(), 10)
-	return i
+	return scaledD.value
 }
 
 // BigFloat returns decimal as BigFloat.