diff --git a/control/zone.hpp b/control/zone.hpp
index 9786db4..706d9c2 100644
--- a/control/zone.hpp
+++ b/control/zone.hpp
@@ -1,4 +1,5 @@
 #pragma once
+#include <chrono>
 #include <vector>
 #include <algorithm>
 #include <sdbusplus/bus.hpp>
@@ -280,6 +281,16 @@
         uint64_t _decSpeedDelta = 0;
 
         /**
+         * Speed increase delay in seconds
+         */
+        std::chrono::seconds _incDelay;
+
+        /**
+         * Speed decrease interval in seconds
+         */
+        std::chrono::seconds _decInterval;
+
+        /**
          * The increase timer object
          */
         phosphor::fan::util::Timer _incTimer;