diff --git a/pid/fancontroller.hpp b/pid/fancontroller.hpp
index 447ce7b..c2b76b9 100644
--- a/pid/fancontroller.hpp
+++ b/pid/fancontroller.hpp
@@ -29,7 +29,7 @@
         PIDController(id, owner),
         _inputs(inputs), _direction(FanSpeedDirection::NEUTRAL)
     {}
-
+    ~FanController();
     double inputProc(void) override;
     double setptProc(void) override;
     void outputProc(double value) override;