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diff --git a/compat/time32/setitimer_time32.c b/compat/time32/setitimer_time32.c
index 4651dacb..2475fd8c 100644
--- a/compat/time32/setitimer_time32.c
+++ b/compat/time32/setitimer_time32.c
@@ -15,9 +15,11 @@ int __setitimer_time32(int which, const struct itimerval32 *restrict new32, stru
* timer setting, so we can't fail on out-of-range old value.
* Since these are relative times, values large enough to overflow
* don't make sense anyway. */
- old32->it_interval.tv_sec = old.it_interval.tv_sec;
- old32->it_interval.tv_usec = old.it_interval.tv_usec;
- old32->it_value.tv_sec = old.it_value.tv_sec;
- old32->it_value.tv_usec = old.it_value.tv_usec;
+ if (old32) {
+ old32->it_interval.tv_sec = old.it_interval.tv_sec;
+ old32->it_interval.tv_usec = old.it_interval.tv_usec;
+ old32->it_value.tv_sec = old.it_value.tv_sec;
+ old32->it_value.tv_usec = old.it_value.tv_usec;
+ }
return 0;
}
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