Index: uspace/lib/c/include/imath.h
===================================================================
--- uspace/lib/c/include/imath.h	(revision b7fd2a02e4161f4edd38548e7f8456b8021549be)
+++ uspace/lib/c/include/imath.h	(revision 9eea0b783493decf0abf11e5aa37be12b86e7706)
@@ -34,6 +34,6 @@
  */
 
-#ifndef LIBC_IMATH_H_
-#define LIBC_IMATH_H_
+#ifndef _LIBC_IMATH_H_
+#define _LIBC_IMATH_H_
 
 #include <stdint.h>