diff --git a/pid/fancontroller.cpp b/pid/fancontroller.cpp
index a1290c5..8bbe3f2 100644
--- a/pid/fancontroller.cpp
+++ b/pid/fancontroller.cpp
@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+#include "config.h"
+
 #include "fancontroller.hpp"
 
 #include "tuning.hpp"