diff --git a/pid/tuning.cpp b/pid/tuning.cpp
index 38fa07b..ca18823 100644
--- a/pid/tuning.cpp
+++ b/pid/tuning.cpp
@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+#include "tuning.hpp"
+
 #include <string>
 
 bool tuningEnabled = false;
@@ -22,3 +24,5 @@
 bool loggingEnabled = false;
 
 bool debugEnabled = false;
+
+bool coreLoggingEnabled = false;