diff --git a/drivers/spi/rk_spi.c b/drivers/spi/rk_spi.c
index c04535ac44..d9a310ce80 100644
--- a/drivers/spi/rk_spi.c
+++ b/drivers/spi/rk_spi.c
@@ -451,7 +451,7 @@ static int rockchip_spi_xfer(struct udevice *dev, unsigned int bitlen,
 
 	/* This is the original 8bit reader/writer code */
 	while (len > 0) {
-		int todo = min(len, 0x10000);
+		int todo = min(len, 0xffff);
 
 		rkspi_enable_chip(regs, false);
 		writel(todo - 1, &regs->ctrlr1);