Index: uspace/lib/libc/arch/ia32/include/ddi.h
===================================================================
--- uspace/lib/libc/arch/ia32/include/ddi.h	(revision fcd7053c1b7bca76e2258a6b2b5ce5b3b416f00f)
+++ uspace/lib/libc/arch/ia32/include/ddi.h	(revision c91c9fb987cd6b3304347080515420a31a935edc)
@@ -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)