diff --git a/include/media/AudioEffect.h b/include/media/AudioEffect.h
index f98002d..4932d40 100644
--- a/include/media/AudioEffect.h
+++ b/include/media/AudioEffect.h
@@ -449,6 +449,7 @@
     sp<EffectClient>        mIEffectClient;     // IEffectClient implementation
     sp<IMemory>             mCblkMemory;        // shared memory for deferred parameter setting
     effect_param_cblk_t*    mCblk;              // control block for deferred parameter setting
+    pid_t                   mClientPid;
 };