diff --git a/include/sensor.hpp b/include/sensor.hpp
index 3ac7774..3df7118 100644
--- a/include/sensor.hpp
+++ b/include/sensor.hpp
@@ -230,6 +230,10 @@
             });
         for (auto& threshold : thresholds)
         {
+            if (std::isnan(threshold.hysteresis))
+            {
+                threshold.hysteresis = hysteresisTrigger;
+            }
             std::shared_ptr<sdbusplus::asio::dbus_interface> iface;
             std::string level;
             std::string alarm;