diff --git a/common/timing.h b/common/timing.h
index a8615e15..133bd4eb 100644
--- a/common/timing.h
+++ b/common/timing.h
@@ -247,7 +247,7 @@ struct TimingAnalyser
     {
         PerDomainPair(ClockDomainPairKey key) : key(key){};
         ClockDomainPairKey key;
-        DelayPair period;
+        DelayPair period{0};
         delay_t worst_setup_slack, worst_hold_slack;
     };