1 files changed, 1 insertions, 1 deletions

diff --git a/include/sys/select.h b/include/sys/select.h
index c8fbb31..605823b 100644
--- a/include/sys/select.h
+++ b/include/sys/select.h
@@ -50,7 +50,7 @@ _STI void __fortify_FD_SET(int __f, fd_set * _FORTIFY_POS0 __s)
         FD_SET(__f, __s);
 }
 
-_STI int __fortify_FD_ISSET(int __f, fd_set * _FORTIFY_POS0 __s)
+_STI int __fortify_FD_ISSET(int __f, const fd_set * _FORTIFY_POS0 __s)
 {
         __fh_size_t __b = __fh_bos(__s, 0);