Index: uspace/lib/c/include/io/concaps.h
===================================================================
--- uspace/lib/c/include/io/concaps.h	(revision 5d94b16cbc3039fadf35402057e9f7dff1917037)
+++ uspace/lib/c/include/io/concaps.h	(revision 9eea0b783493decf0abf11e5aa37be12b86e7706)
@@ -33,6 +33,6 @@
  */
 
-#ifndef LIBC_IO_CONCAPS_H_
-#define LIBC_IO_CONCAPS_H_
+#ifndef _LIBC_IO_CONCAPS_H_
+#define _LIBC_IO_CONCAPS_H_
 
 typedef enum {