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 bc73be3215c832cdb0c8a5022db800902f9f62dc)
@@ -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 {