diff --git a/model/fw/per-fib-limits.h b/model/fw/per-fib-limits.h
index 2ee5141..75d9f6e 100644
--- a/model/fw/per-fib-limits.h
+++ b/model/fw/per-fib-limits.h
@@ -70,6 +70,9 @@
 private:
   EventId m_decayLimitsEvent;
 
+  double m_threshold;
+  double m_graceAcceptProbability;
+
   typedef FwStats super;
 };