diff --git a/audio/aidl/vts/EffectHelper.h b/audio/aidl/vts/EffectHelper.h
index 3877c60..f0622a8 100644
--- a/audio/aidl/vts/EffectHelper.h
+++ b/audio/aidl/vts/EffectHelper.h
@@ -84,6 +84,7 @@
 }
 
 static constexpr float kMaxAudioSampleValue = 1;
+static constexpr int kSamplingFrequency = 44100;
 
 class EffectHelper {
   public: