Index: uspace/lib/libc/include/unistd.h
===================================================================
--- uspace/lib/libc/include/unistd.h	(revision 22e6802c4fece061e824ee107b0e2fff8c15e85b)
+++ uspace/lib/libc/include/unistd.h	(revision ed90317444652a29e89501a128d66020aaea52b5)
@@ -47,5 +47,11 @@
 #ifndef SEEK_SET
 	#define SEEK_SET  0
+#endif
+
+#ifndef SEEK_CUR
 	#define SEEK_CUR  1
+#endif
+
+#ifndef SEEK_END
 	#define SEEK_END  2
 #endif
@@ -58,6 +64,6 @@
 extern ssize_t read(int, void *, size_t);
 
-extern off_t lseek(int, off_t, int);
-extern int ftruncate(int, off_t);
+extern off64_t lseek(int, off64_t, int);
+extern int ftruncate(int, aoff64_t);
 
 extern int close(int);
@@ -69,7 +75,7 @@
 extern int chdir(const char *);
 
-extern void _exit(int status) __attribute__ ((noreturn));
-extern int usleep(useconds_t uses);
-extern unsigned int sleep(unsigned int se);
+extern void _exit(int) __attribute__((noreturn));
+extern int usleep(useconds_t);
+extern unsigned int sleep(unsigned int);
 
 #endif