diff --git a/drivers/vhost/tcm_vhost.h b/drivers/vhost/tcm_vhost.h
index eff42df14de9..e9d5c020fb39 100644
--- a/drivers/vhost/tcm_vhost.h
+++ b/drivers/vhost/tcm_vhost.h
@@ -91,7 +91,7 @@ struct tcm_vhost_tport {
 
 struct vhost_scsi_target {
 	int abi_version;
-	unsigned char vhost_wwpn[TRANSPORT_IQN_LEN];
+	char vhost_wwpn[TRANSPORT_IQN_LEN];
 	unsigned short vhost_tpgt;
 };