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-rw-r--r--posix/unistd.h6
1 files changed, 3 insertions, 3 deletions
diff --git a/posix/unistd.h b/posix/unistd.h
index 7ae40b2ca5..e72553dc0d 100644
--- a/posix/unistd.h
+++ b/posix/unistd.h
@@ -380,7 +380,7 @@ extern __useconds_t ualarm (__useconds_t __value, __useconds_t __interval)
 
 /* Sleep USECONDS microseconds, or until a signal arrives that is not blocked
    or ignored.  */
-extern void usleep (__useconds_t __useconds) __THROW;
+extern int usleep (__useconds_t __useconds) __THROW;
 #endif
 
 
@@ -704,7 +704,7 @@ extern int tcsetpgrp (int __fd, __pid_t __pgrp_id) __THROW;
 
 /* Return the login name of the user.  */
 extern char *getlogin (void) __THROW;
-#ifdef __USE_REENTRANT
+#if defined __USE_REENTRANT || defined __USE_UNIX98
 /* Return at most NAME_LEN characters of the login name of the user in NAME.
    If it cannot be determined or some other error occurred, return the error
    code.  Otherwise return 0.  */
@@ -805,7 +805,7 @@ extern int daemon (int __nochdir, int __noclose) __THROW;
 extern long int gethostid (void) __THROW;
 
 /* Make all changes done to all files actually appear on disk.  */
-extern int sync (void) __THROW;
+extern void sync (void) __THROW;
 
 
 /* Return the number of bytes in a page.  This is the system's page size,