diff --git a/drivers/gpu/drm/radeon/atombios_i2c.c b/drivers/gpu/drm/radeon/atombios_i2c.c
index 4157780585a0..9022e9af11a0 100644
--- a/drivers/gpu/drm/radeon/atombios_i2c.c
+++ b/drivers/gpu/drm/radeon/atombios_i2c.c
@@ -35,7 +35,7 @@
 
 static int radeon_process_i2c_ch(struct radeon_i2c_chan *chan,
 				 u8 slave_addr, u8 flags,
-				 u8 *buf, u8 num)
+				 u8 *buf, int num)
 {
 	struct drm_device *dev = chan->dev;
 	struct radeon_device *rdev = dev->dev_private;