Index: uspace/lib/libc/include/unistd.h
===================================================================
--- uspace/lib/libc/include/unistd.h	(revision 67f63c47e41903200a85cbc1871d6437a812e285)
+++ uspace/lib/libc/include/unistd.h	(revision 0ee4322fd8ff41e424fb8a9d65e8b6d189d22883)
@@ -46,7 +46,8 @@
 #define SEEK_END	2
 
-extern ssize_t write(int fd, const void * buf, size_t count);
-extern ssize_t read(int fd, void * buf, size_t count);
+extern ssize_t write(int, const void *, size_t);
+extern ssize_t read(int, void *, size_t);
 extern off_t lseek(int, off_t, int);
+extern int ftruncate(int, off_t);
 
 extern void _exit(int status);