diff --git a/drivers/spi/spi-sc18is602.c b/drivers/spi/spi-sc18is602.c
index 237f2e7a7179..c04e601152f1 100644
--- a/drivers/spi/spi-sc18is602.c
+++ b/drivers/spi/spi-sc18is602.c
@@ -290,7 +290,7 @@ static int sc18is602_probe(struct i2c_client *client,
 			hw->freq = SC18IS602_CLOCK;
 		break;
 	}
-	master->bus_num = client->adapter->nr;
+	master->bus_num = np ? -1 : client->adapter->nr;
 	master->mode_bits = SPI_CPHA | SPI_CPOL | SPI_LSB_FIRST;
 	master->bits_per_word_mask = SPI_BPW_MASK(8);
 	master->setup = sc18is602_setup;