diff --git a/src/vz/vz_driver.h b/src/vz/vz_driver.h
index 593a585075cfc36f21c5c60c8005e23bc3ad58d5..ce75b11c04b9a5dfad0bc258eff926885213d421 100644
--- a/src/vz/vz_driver.h
+++ b/src/vz/vz_driver.h
@@ -20,9 +20,6 @@
  *
  */
 
-#ifndef LIBVIRT_VZ_DRIVER_H
-# define LIBVIRT_VZ_DRIVER_H
+#pragma once
 
 int vzRegister(void);
-
-#endif /* LIBVIRT_VZ_DRIVER_H */
diff --git a/src/vz/vz_sdk.h b/src/vz/vz_sdk.h
index e412b821bbf9ddc4527b61d04a265d3cc4576fc2..5acee2ca9da023e947b3e58cd139f53dec0321e6 100644
--- a/src/vz/vz_sdk.h
+++ b/src/vz/vz_sdk.h
@@ -20,12 +20,11 @@
  *
  */
 
-#ifndef LIBVIRT_VZ_SDK_H
-# define LIBVIRT_VZ_SDK_H
+#pragma once
 
-# include <Parallels.h>
+#include <Parallels.h>
 
-# include "vz_utils.h"
+#include "vz_utils.h"
 
 int prlsdkInit(void);
 void prlsdkDeinit(void);
@@ -94,5 +93,3 @@ PRL_HANDLE
 prlsdkSdkDomainLookupByName(vzDriverPtr driver, const char *name);
 int prlsdkCancelJob(virDomainObjPtr dom);
 int prlsdkResizeImage(virDomainObjPtr dom, virDomainDiskDefPtr disk, unsigned long long newsize);
-
-#endif /* LIBVIRT_VZ_SDK_H */
diff --git a/src/vz/vz_utils.h b/src/vz/vz_utils.h
index fb289ed4a725a4857db7ea3218bf5ba5753c5ff3..d9e3ebc30a7f89f83bd5eace4ba4df319a260d03 100644
--- a/src/vz/vz_utils.h
+++ b/src/vz/vz_utils.h
@@ -20,27 +20,26 @@
  *
  */
 
-#ifndef LIBVIRT_VZ_UTILS_H
-# define LIBVIRT_VZ_UTILS_H
+#pragma once
 
-# include <Parallels.h>
+#include <Parallels.h>
 
-# include "driver.h"
-# include "conf/domain_conf.h"
-# include "conf/snapshot_conf.h"
-# include "conf/virdomainsnapshotobjlist.h"
-# include "conf/virdomainobjlist.h"
-# include "conf/domain_event.h"
-# include "virthread.h"
-# include "datatypes.h"
+#include "driver.h"
+#include "conf/domain_conf.h"
+#include "conf/snapshot_conf.h"
+#include "conf/virdomainsnapshotobjlist.h"
+#include "conf/virdomainobjlist.h"
+#include "conf/domain_event.h"
+#include "virthread.h"
+#include "datatypes.h"
 
-# define vzParseError() \
+#define vzParseError() \
     virReportErrorHelper(VIR_FROM_TEST, VIR_ERR_OPERATION_FAILED, __FILE__, \
                          __FUNCTION__, __LINE__, _("Can't parse prlctl output"))
 
-# define IS_CT(def)  (def->os.type == VIR_DOMAIN_OSTYPE_EXE)
+#define IS_CT(def)  (def->os.type == VIR_DOMAIN_OSTYPE_EXE)
 
-# define vzDomNotFoundError(domain) \
+#define vzDomNotFoundError(domain) \
     do { \
         char uuidstr[VIR_UUID_STRING_BUFLEN]; \
         virUUIDFormat(domain->uuid, uuidstr); \
@@ -48,8 +47,8 @@
                        _("no domain with matching uuid '%s'"), uuidstr); \
     } while (0)
 
-# define PARALLELS_DOMAIN_ROUTED_NETWORK_NAME   "host-routed"
-# define VIRTUOZZO_VER_7 ((unsigned long)7000000)
+#define PARALLELS_DOMAIN_ROUTED_NETWORK_NAME   "host-routed"
+#define VIRTUOZZO_VER_7 ((unsigned long)7000000)
 
 struct _vzCapabilities {
     virStorageFileFormat vmDiskFormat;
@@ -62,7 +61,7 @@ typedef struct _vzCapabilities vzCapabilities;
 typedef struct _vzCapabilities *vzCapabilitiesPtr;
 
 /* +2 to keep enclosing { and } */
-# define VIR_UUID_STRING_BRACED_BUFLEN (VIR_UUID_STRING_BUFLEN + 2)
+#define VIR_UUID_STRING_BRACED_BUFLEN (VIR_UUID_STRING_BUFLEN + 2)
 
 struct _vzDriver {
     virObjectLockable parent;
@@ -146,7 +145,7 @@ vzGetDefaultSCSIModel(vzDriverPtr driver,
 
 int vzCheckUnsupportedGraphics(virDomainGraphicsDefPtr gr);
 
-# define PARALLELS_BLOCK_STATS_FOREACH(OP) \
+ define PARALLELS_BLOCK_STATS_FOREACH(OP) \
     OP(rd_req, VIR_DOMAIN_BLOCK_STATS_READ_REQ, "read_requests") \
     OP(rd_bytes, VIR_DOMAIN_BLOCK_STATS_READ_BYTES, "read_total") \
     OP(wr_req, VIR_DOMAIN_BLOCK_STATS_WRITE_REQ, "write_requests") \
@@ -158,5 +157,3 @@ void
 vzDomainObjEndJob(virDomainObjPtr dom);
 int
 vzDomainJobUpdateTime(vzDomainJobObjPtr job);
-
-#endif /* LIBVIRT_VZ_UTILS_H */