diff --git a/src/audio/null/null.h b/src/audio/null/null.h
index 4392791..c50c545 100644
--- a/src/audio/null/null.h
+++ b/src/audio/null/null.h
@@ -52,6 +52,7 @@ class Audio_Null: public AudioBase
     void reset () override {}
     bool write (uint_least32_t frames) override;
     void pause () override {}
+    void clearBuffer() override {}
 };
 
 #endif // AUDIO_NULL_H