diff --git a/include/types/physaddr.h b/include/types/physaddr.h
index 3e12471..7fa7f73 100644
--- a/include/types/physaddr.h
+++ b/include/types/physaddr.h
@@ -1,5 +1,5 @@
-#ifndef _QUARK_PHYSADDR_H
-#define _QUARK_PHYSADDR_H
+#ifndef QUARK_PHYSADDR_H
+#define QUARK_PHYSADDR_H
 
 typedef unsigned long int physaddr_t;