Index: uspace/lib/c/include/stack.h
===================================================================
--- uspace/lib/c/include/stack.h	(revision cf13b1787530fe212a0ac74399fd6d4b0f096731)
+++ uspace/lib/c/include/stack.h	(revision 60cb9e1ab733a49d02a64b0658863ea942720acf)
@@ -33,6 +33,6 @@
  */
 
-#ifndef LIBC_STACK_H_
-#define LIBC_STACK_H_
+#ifndef _LIBC_STACK_H_
+#define _LIBC_STACK_H_
 
 #include <types/common.h>