diff --git a/services/audioflinger/AudioFlinger.cpp b/services/audioflinger/AudioFlinger.cpp
index 5b09d54..527fd65 100644
--- a/services/audioflinger/AudioFlinger.cpp
+++ b/services/audioflinger/AudioFlinger.cpp
@@ -169,7 +169,8 @@
       mBtNrecIsOff(false),
       mIsLowRamDevice(true),
       mIsDeviceTypeKnown(false),
-      mGlobalEffectEnableTime(0)
+      mGlobalEffectEnableTime(0),
+      mPrimaryOutputSampleRate(0)
 {
     getpid_cached = getpid();
     char value[PROPERTY_VALUE_MAX];
@@ -1679,6 +1680,8 @@
             mHardwareStatus = AUDIO_HW_SET_MODE;
             hwDevHal->set_mode(hwDevHal, mMode);
             mHardwareStatus = AUDIO_HW_IDLE;
+
+            mPrimaryOutputSampleRate = config.sample_rate;
         }
         return id;
     }
diff --git a/services/audioflinger/AudioFlinger.h b/services/audioflinger/AudioFlinger.h
index 29dc6b2..8d11e72 100644
--- a/services/audioflinger/AudioFlinger.h
+++ b/services/audioflinger/AudioFlinger.h
@@ -691,6 +691,9 @@
     nsecs_t mGlobalEffectEnableTime;  // when a global effect was last enabled
 
     sp<PatchPanel> mPatchPanel;
+
+    uint32_t    mPrimaryOutputSampleRate;   // sample rate of the primary output, or zero if none
+                                            // protected by mHardwareLock
 };
 
 #undef INCLUDING_FROM_AUDIOFLINGER_H