diff --git a/include/SharedPtr.h b/include/SharedPtr.h
index f62c6c97e0e3038b7a483a3a39297d7acdeac7d4..07363d15f1f9cf31f9982be54d9538e9b49bf6be 100644
--- a/include/SharedPtr.h
+++ b/include/SharedPtr.h
@@ -15,8 +15,8 @@
  *                                                                         *
  ***************************************************************************/
 
-#ifndef _SHARED_PTR_H
-#define _SHARED_PTR_H
+#ifndef __PACKETLIB_SHARED_PTR_H
+#define __PACKETLIB_SHARED_PTR_H
 
 namespace PacketLib
 {