Index: uspace/lib/c/include/byteorder.h
===================================================================
--- uspace/lib/c/include/byteorder.h	(revision 1433ecda9b732f3f185f902feb26826ec2496e03)
+++ uspace/lib/c/include/byteorder.h	(revision 3faf90addd9cdd0dc3b59b702985bfe74ecedbd9)
@@ -33,6 +33,6 @@
  */
 
-#ifndef LIBC_BYTEORDER_H_
-#define LIBC_BYTEORDER_H_
+#ifndef _LIBC_BYTEORDER_H_
+#define _LIBC_BYTEORDER_H_
 
 #include <stdint.h>