Index: uspace/lib/libc/arch/ia32/include/ddi.h
===================================================================
--- uspace/lib/libc/arch/ia32/include/ddi.h	(revision f2ef7fd587b7ec8f9d3293862101dfa7dbf2ecf6)
+++ uspace/lib/libc/arch/ia32/include/ddi.h	(revision a212307ca711c2759f33236c7ca554a42a72d9cd)
@@ -33,4 +33,6 @@
 #ifndef LIBC_ia32_DDI_H_
 #define LIBC_ia32_DDI_H_
+
+#define IO_SPACE_BOUNDARY	((void *) (64 * 1024))
 
 static inline void outb(int16_t port, uint8_t b)