diff --git a/test/pid_fancontroller_unittest.cpp b/test/pid_fancontroller_unittest.cpp
index 315931f..3ee585e 100644
--- a/test/pid_fancontroller_unittest.cpp
+++ b/test/pid_fancontroller_unittest.cpp
@@ -1,3 +1,4 @@
+#include "config.h"
 
 #include "pid/ec/pid.hpp"
 #include "pid/fan.hpp"