diff --git a/fan_speed.hpp b/fan_speed.hpp
index 7c7da3a..eb9882c 100644
--- a/fan_speed.hpp
+++ b/fan_speed.hpp
@@ -45,6 +45,11 @@
          */
         uint64_t target(uint64_t value) override;
 
+        /**
+         * @brief Writes the pwm_enable sysfs entry.
+         */
+        void enable();
+
     private:
         /** @brief hwmon class root */
         std::string sysfsRoot;