Index: uspace/lib/libc/include/errno.h
===================================================================
--- uspace/lib/libc/include/errno.h	(revision f772105ed5925f83580e75e164e8fbc7833ddf4e)
+++ uspace/lib/libc/include/errno.h	(revision a6d97fb978c424584d99e36442e39da290db961c)
@@ -47,4 +47,5 @@
 #define ERANGE		(-263)
 #define EXDEV		(-264)
+#define EIO		(-265)
 
 #endif