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

diff --git a/man2/clock_getres.2 b/man2/clock_getres.2
index 228d21467..23c5b71c8 100644
--- a/man2/clock_getres.2
+++ b/man2/clock_getres.2
@@ -23,7 +23,7 @@ .SH SYNOPSIS
 .nf
 .B #include <time.h>
 .PP
-.BI "int clock_getres(clockid_t " clockid ", struct timespec *" res );
+.BI "int clock_getres(clockid_t " clockid ", struct timespec *_Nullable " res );
 .PP
 .BI "int clock_gettime(clockid_t " clockid ", struct timespec *" tp );
 .BI "int clock_settime(clockid_t " clockid ", const struct timespec *" tp );
-- 
2.38.1