diff --git a/newlib/ChangeLog b/newlib/ChangeLog
index a2266a6d2..b82bd80bd 100644
--- a/newlib/ChangeLog
+++ b/newlib/ChangeLog
@@ -1,3 +1,8 @@
+2003-04-15  Chris January <chris@atomice.net>
+
+	* newlib/libc/include/sys/unistd.h: add declaration for gethostid on
+	Cygwin.
+
 2003-04-09  J"orn Rennecke <joern.rennecke@superh.com>
 
 	* libc/machine/sh/memset.S: Avoid clobbering volatile
diff --git a/newlib/libc/include/sys/unistd.h b/newlib/libc/include/sys/unistd.h
index 8678a3c9b..85a2f7aae 100644
--- a/newlib/libc/include/sys/unistd.h
+++ b/newlib/libc/include/sys/unistd.h
@@ -60,6 +60,9 @@ uid_t   _EXFUN(geteuid, (void ));
 gid_t   _EXFUN(getgid, (void ));
 #endif
 int     _EXFUN(getgroups, (int __gidsetsize, gid_t __grouplist[] ));
+#if defined(__CYGWIN__)
+long    _EXFUN(gethostid, (void));
+#endif
 char    _EXFUN(*getlogin, (void ));
 #if defined(_POSIX_THREAD_SAFE_FUNCTIONS)
 int _EXFUN(getlogin_r, (char *name, size_t namesize) );