diff --git a/examples/dds/Sampler.h b/examples/dds/Sampler.h
index b7856768..7d74736a 100644
--- a/examples/dds/Sampler.h
+++ b/examples/dds/Sampler.h
@@ -28,7 +28,7 @@ class Sampler : public FairMQDevice
     void InitTask() override;
 
   protected:
-    virtual bool ConditionalRun();
+    bool ConditionalRun() override;
 
   private:
     uint64_t fIterations;