diff --git a/include/PwmSensor.hpp b/include/PwmSensor.hpp
index 69a35c4..1f8a467 100644
--- a/include/PwmSensor.hpp
+++ b/include/PwmSensor.hpp
@@ -22,7 +22,7 @@
     std::shared_ptr<sdbusplus::asio::dbus_interface> sensorInterface;
     std::shared_ptr<sdbusplus::asio::dbus_interface> controlInterface;
     std::shared_ptr<sdbusplus::asio::dbus_interface> association;
-    size_t pwmMax;
+    double pwmMax;
     void setValue(uint32_t value);
     uint32_t getValue(bool errThrow = true);
 };