diff --git a/decimal.go b/decimal.go
index b48cfa9..bf27f08 100644
--- a/decimal.go
+++ b/decimal.go
@@ -1864,6 +1864,10 @@ func (d *Decimal) Scan(value interface{}) error {
 		*d, err = NewFromString(unquoteIfQuoted(string(v)))
 		return err
 
+	case big.Int:
+		*d = NewFromBigInt(&v, 0)
+		return nil
+
 	default:
 		return fmt.Errorf("could not convert value '%+v' to any known type", value)
 	}
diff --git a/decimal_test.go b/decimal_test.go
index d288821..7e007bd 100644
--- a/decimal_test.go
+++ b/decimal_test.go
@@ -2479,6 +2479,11 @@ func TestDecimal_Scan(t *testing.T) {
 	scanHelper(t, dbvalueStr, expected)
 	scanHelper(t, valueStr, expected)
 
+	// test big.Int
+	value := big.NewInt(dbvalueInt)
+	expected = NewFromBigInt(value, 0)
+	scanHelper(t, *value, expected)
+
 	type foo struct{}
 	a := Decimal{}
 	err = a.Scan(foo{})