diff --git a/drivers/scsi/qedf/qedf.h b/drivers/scsi/qedf/qedf.h
index 40aeb6bb96a2afd11c3264b7ea0004110033e2d1..07ee88200e91cfc072eed5506c6eca0974dda67f 100644
--- a/drivers/scsi/qedf/qedf.h
+++ b/drivers/scsi/qedf/qedf.h
@@ -259,7 +259,7 @@ struct qedf_io_log {
 	uint16_t task_id;
 	uint32_t port_id; /* Remote port fabric ID */
 	int lun;
-	char op; /* SCSI CDB */
+	unsigned char op; /* SCSI CDB */
 	uint8_t lba[4];
 	unsigned int bufflen; /* SCSI buffer length */
 	unsigned int sg_count; /* Number of SG elements */