diff --git a/Modules/include/PeriodicTrigger.h b/Modules/include/PeriodicTrigger.h
index 15679d5b973c5a4056e059cce67c82b8f97b9a0f..cebcdb42e34a5554b2936ae37b483efbb7ec7bd9 100644
--- a/Modules/include/PeriodicTrigger.h
+++ b/Modules/include/PeriodicTrigger.h
@@ -37,7 +37,7 @@ namespace ChimeraTK {
       tick.write();
     }
 
-    void mainLoop() {
+    void mainLoop() override {
       if(Application::getInstance().isTestableModeEnabled()) {
         return;
       }