Signed-off-by: Alejandro Colomar <alx@kernel.org>
---
 man2/poll.2 | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/man2/poll.2 b/man2/poll.2
index 0d67a6add..fa22e2002 100644
--- a/man2/poll.2
+++ b/man2/poll.2
@@ -23,7 +23,8 @@ .SH SYNOPSIS
 .B #include <poll.h>
 .PP
 .BI "int ppoll(struct pollfd *" fds ", nfds_t " nfds ,
-.BI "          const struct timespec *" tmo_p ", const sigset_t *" sigmask );
+.BI "          const struct timespec *_Nullable " tmo_p ,
+.BI "          const sigset_t *_Nullable " sigmask );
 .fi
 .SH DESCRIPTION
 .BR poll ()
-- 
2.38.1