diff --git a/services/audioflinger/IAfEffect.h b/services/audioflinger/IAfEffect.h
index b9bb18c..2bf252a 100644
--- a/services/audioflinger/IAfEffect.h
+++ b/services/audioflinger/IAfEffect.h
@@ -163,8 +163,9 @@
     virtual int16_t *inBuffer() const = 0;
     virtual status_t setDevices(const AudioDeviceTypeAddrVector &devices) = 0;
     virtual status_t setInputDevice(const AudioDeviceTypeAddr &device) = 0;
-    virtual status_t setVolume(uint32_t *left, uint32_t *right, bool controller,
-                               bool force = false) = 0;
+    virtual status_t setVolume_l(uint32_t* left, uint32_t* right,
+                                 bool controller /* effect controlling chain volume */,
+                                 bool force = false) REQUIRES(audio_utils::EffectChain_Mutex) = 0;
     virtual status_t setOffloaded_l(bool offloaded, audio_io_handle_t io) = 0;
     virtual bool isOffloaded_l() const = 0;