diff --git a/newlib/ChangeLog b/newlib/ChangeLog
index 4930593d2..ac87504b4 100644
--- a/newlib/ChangeLog
+++ b/newlib/ChangeLog
@@ -1,3 +1,7 @@
+2015-01-14  Joel Sherrill <joel.sherrill@oarcorp.com>
+
+	* libc/include/sys/unistd.h [__BSD_VISIBLE]: Add issetugid() prototype.
+
 2015-01-14  Joel Sherrill <joel.sherrill@oarcorp.com>
 
 	* doc/makedoc.c: Use uintptr_t to avoid int/pointer size warnings
diff --git a/newlib/libc/include/sys/unistd.h b/newlib/libc/include/sys/unistd.h
index a741383d0..eb26921cc 100644
--- a/newlib/libc/include/sys/unistd.h
+++ b/newlib/libc/include/sys/unistd.h
@@ -117,6 +117,9 @@ char *  _EXFUN(getwd, (char *__buf ));
 int	_EXFUN(iruserok, (unsigned long raddr, int superuser, const char *ruser, const char *luser));
 #endif
 int     _EXFUN(isatty, (int __fildes ));
+#if __BSD_VISIBLE
+int        _EXFUN(issetugid, (void));
+#endif
 #if !defined(__INSIDE_CYGWIN__)
 int     _EXFUN(lchown, (const char *__path, uid_t __owner, gid_t __group ));
 #endif