diff --git a/sys/dev/drm2/radeon/atombios_dp.c b/sys/dev/drm2/radeon/atombios_dp.c
index 3c0f7f5..f92df62 100644
--- a/sys/dev/drm2/radeon/atombios_dp.c
+++ b/sys/dev/drm2/radeon/atombios_dp.c
@@ -272,7 +272,7 @@ int radeon_dp_i2c_aux_ch(device_t dev, int mode, u8 write_byte, u8 *read_byte)
 		case AUX_I2C_REPLY_ACK:
 			if (mode == MODE_I2C_READ)
 				*read_byte = reply[0];
-			return ret;
+			return (0); /* Return ret on Linux. */
 		case AUX_I2C_REPLY_NACK:
 			DRM_DEBUG_KMS("aux_i2c nack\n");
 			return -EREMOTEIO;