diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 91b9eca75b75..cad9ef012a14 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -1998,8 +1998,10 @@ static int sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer
 	u8 type;
 	int ret = 0;
 
-	if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0)
+	if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0) {
+		sdkp->protection_type = 0;
 		return ret;
+	}
 
 	type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */