Index: uspace/lib/posix/include/posix/stdio.h
===================================================================
--- uspace/lib/posix/include/posix/stdio.h	(revision 09d13c8e567316acfec91989df4a5d961f8fb644)
+++ uspace/lib/posix/include/posix/stdio.h	(revision bd768718dfae4f0bf4db7bf22af81211b1851ee1)
@@ -39,9 +39,4 @@
 #ifndef __POSIX_DEF__
 #define __POSIX_DEF__(x) x
-/* DEBUG macro does not belong to POSIX stdio.h. Its unconditional
- * definition in the native stdio.h causes unexpected behaviour of
- * applications which uses their own DEBUG macro (e.g. debugging
- * output is printed even if not desirable). */
-#undef DEBUG
 #endif