diff --git a/reactos/dll/win32/inetcomm/inetcomm_private.h b/reactos/dll/win32/inetcomm/inetcomm_private.h
index c0712a30d34..b713a68a761 100644
--- a/reactos/dll/win32/inetcomm/inetcomm_private.h
+++ b/reactos/dll/win32/inetcomm/inetcomm_private.h
@@ -18,7 +18,9 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  */
 
-#include <stdarg.h>
+#ifndef _INETCOMM_PRIVATE_H_
+#define _INETCOMM_PRIVATE_H_
+
 #include <stdio.h>
 
 #define WIN32_NO_STATUS
@@ -99,3 +101,5 @@ HRESULT MimeInternational_Construct(IMimeInternational **internat) DECLSPEC_HIDD
 HRESULT SMTPTransportCF_Create(REFIID riid, LPVOID *ppv) DECLSPEC_HIDDEN;
 HRESULT IMAPTransportCF_Create(REFIID riid, LPVOID *ppv) DECLSPEC_HIDDEN;
 HRESULT POP3TransportCF_Create(REFIID riid, LPVOID *ppv) DECLSPEC_HIDDEN;
+
+#endif /* _INETCOMM_PRIVATE_H_ */