diff --git a/module/Vendor/SimpleSocket/include/ActiveSocket.h b/module/Vendor/SimpleSocket/include/ActiveSocket.h
index e4b699e5..0b6539ea 100644
--- a/module/Vendor/SimpleSocket/include/ActiveSocket.h
+++ b/module/Vendor/SimpleSocket/include/ActiveSocket.h
@@ -40,8 +40,7 @@
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  * OF THE POSSIBILITY OF SUCH DAMAGE.
  *----------------------------------------------------------------------------*/
-#ifndef __ACTIVESOCKET_H__
-#define __ACTIVESOCKET_H__
+#pragma once
 
 #include "SimpleSocket.h"
 
@@ -86,6 +85,3 @@ private:
 private:
     struct hostent *m_pHE;
 };
-
-#endif /*  __ACTIVESOCKET_H__  */
-
diff --git a/module/Vendor/SimpleSocket/include/HostConf.h b/module/Vendor/SimpleSocket/include/HostConf.h
index b97cdaaf..5512cae3 100644
--- a/module/Vendor/SimpleSocket/include/HostConf.h
+++ b/module/Vendor/SimpleSocket/include/HostConf.h
@@ -41,8 +41,7 @@
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  * OF THE POSSIBILITY OF SUCH DAMAGE.
  *----------------------------------------------------------------------------*/
-#ifndef __HOST_H__
-#define __HOST_H__
+#pragma once
 
 #include <stddef.h>
 #include <stdint.h>
@@ -209,5 +208,3 @@
   #define VPRINTF  vprintf
   #define FPRINTF  fprintf
 #endif
-
-#endif /* __HOST_H__ */
diff --git a/module/Vendor/SimpleSocket/include/PassiveSocket.h b/module/Vendor/SimpleSocket/include/PassiveSocket.h
index 2e20a39c..2afeb2a0 100644
--- a/module/Vendor/SimpleSocket/include/PassiveSocket.h
+++ b/module/Vendor/SimpleSocket/include/PassiveSocket.h
@@ -40,8 +40,8 @@
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  * OF THE POSSIBILITY OF SUCH DAMAGE.
  *----------------------------------------------------------------------------*/
-#ifndef __PASSIVESOCKET_H__
-#define __PASSIVESOCKET_H__
+#pragma once
+
 #include "ActiveSocket.h"
 
 /// Provides a platform independent class to create a passive socket.
@@ -115,5 +115,3 @@ private:
     struct ip_mreq  m_stMulticastRequest;   /// group address for multicast
 
 };
-
-#endif // __PASSIVESOCKET_H__
diff --git a/module/Vendor/SimpleSocket/include/SimpleSocket.h b/module/Vendor/SimpleSocket/include/SimpleSocket.h
index e2090941..36ce6236 100644
--- a/module/Vendor/SimpleSocket/include/SimpleSocket.h
+++ b/module/Vendor/SimpleSocket/include/SimpleSocket.h
@@ -40,8 +40,7 @@
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  * OF THE POSSIBILITY OF SUCH DAMAGE.
  *----------------------------------------------------------------------------*/
-#ifndef __SOCKET_H__
-#define __SOCKET_H__
+#pragma once
 
 #ifdef _LINUX
     #define _DEFAULT_SOURCE
@@ -581,7 +580,3 @@ protected:
     fd_set               m_readFds;           /// read file descriptor set
     fd_set               m_errorFds;          /// error file descriptor set
 };
-
-
-#endif /*  __SOCKET_H__  */
-
diff --git a/module/Vendor/SimpleSocket/include/StatTimer.h b/module/Vendor/SimpleSocket/include/StatTimer.h
index 2211e64d..63392a8c 100644
--- a/module/Vendor/SimpleSocket/include/StatTimer.h
+++ b/module/Vendor/SimpleSocket/include/StatTimer.h
@@ -40,8 +40,7 @@
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  * OF THE POSSIBILITY OF SUCH DAMAGE.
  *----------------------------------------------------------------------------*/
-#ifndef __CSTATTIMER_H__
-#define __CSTATTIMER_H__
+#pragma once
 
 #include <string.h>
 
@@ -111,5 +110,3 @@ private:
     struct timeval  m_startTime;
     struct timeval  m_endTime;
 };
-
-#endif // __CSTATTIMER_H__