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-rw-r--r--sysdeps/posix/clock_getres.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/sysdeps/posix/clock_getres.c b/sysdeps/posix/clock_getres.c
index 252fc9b4ed..b6c3a10791 100644
--- a/sysdeps/posix/clock_getres.c
+++ b/sysdeps/posix/clock_getres.c
@@ -34,8 +34,11 @@ realtime_getres (struct timespec *res)
       /* This implementation assumes that the realtime clock has a
 	 resolution higher than 1 second.  This is the case for any
 	 reasonable implementation.  */
-      res->tv_sec = 0;
-      res->tv_nsec = 1000000000 / clk_tck;
+      if (res)
+	{
+	  res->tv_sec = 0;
+	  res->tv_nsec = 1000000000 / clk_tck;
+	}
       return 0;
     }