diff --git a/libs/gui/BitTube.cpp b/libs/gui/BitTube.cpp
index 0282834..3ed1f37 100644
--- a/libs/gui/BitTube.cpp
+++ b/libs/gui/BitTube.cpp
@@ -99,6 +99,11 @@
     return mReceiveFd;
 }
 
+int BitTube::getSendFd() const
+{
+    return mSendFd;
+}
+
 ssize_t BitTube::write(void const* vaddr, size_t size)
 {
     ssize_t err, len;
diff --git a/libs/gui/ISensorEventConnection.cpp b/libs/gui/ISensorEventConnection.cpp
index 8f88141..28fcb53 100644
--- a/libs/gui/ISensorEventConnection.cpp
+++ b/libs/gui/ISensorEventConnection.cpp
@@ -34,8 +34,7 @@
     GET_SENSOR_CHANNEL = IBinder::FIRST_CALL_TRANSACTION,
     ENABLE_DISABLE,
     SET_EVENT_RATE,
-    FLUSH_SENSOR,
-    DECREASE_WAKE_LOCK_REFCOUNT
+    FLUSH_SENSOR
 };
 
 class BpSensorEventConnection : public BpInterface<ISensorEventConnection>
@@ -84,13 +83,6 @@
         remote()->transact(FLUSH_SENSOR, data, &reply);
         return reply.readInt32();
     }
-
-    virtual void decreaseWakeLockRefCount() {
-        Parcel data, reply;
-        data.writeInterfaceToken(ISensorEventConnection::getInterfaceDescriptor());
-        remote()->transact(DECREASE_WAKE_LOCK_REFCOUNT, data, &reply, IBinder::FLAG_ONEWAY);
-        return;
-    }
 };
 
 IMPLEMENT_META_INTERFACE(SensorEventConnection, "android.gui.SensorEventConnection");
@@ -133,11 +125,6 @@
             reply->writeInt32(result);
             return NO_ERROR;
         } break;
-        case DECREASE_WAKE_LOCK_REFCOUNT: {
-            CHECK_INTERFACE(ISensorEventConnection, data, reply);
-            decreaseWakeLockRefCount();
-            return NO_ERROR;
-        } break;
     }
     return BBinder::onTransact(code, data, reply, flags);
 }
diff --git a/libs/gui/SensorEventQueue.cpp b/libs/gui/SensorEventQueue.cpp
index c2eaf4e..842502d 100644
--- a/libs/gui/SensorEventQueue.cpp
+++ b/libs/gui/SensorEventQueue.cpp
@@ -18,6 +18,7 @@
 
 #include <stdint.h>
 #include <sys/types.h>
+#include <sys/socket.h>
 
 #include <utils/Errors.h>
 #include <utils/RefBase.h>
@@ -147,7 +148,14 @@
 void SensorEventQueue::sendAck(const ASensorEvent* events, int count) {
     for (int i = 0; i < count; ++i) {
         if (events[i].flags & WAKE_UP_SENSOR_EVENT_NEEDS_ACK) {
-            mSensorEventConnection->decreaseWakeLockRefCount();
+            // Send just a byte of data to acknowledge for the wake up sensor events
+            // received
+            char buf = '1';
+            ssize_t size = ::send(mSensorChannel->getFd(), &buf, sizeof(buf),
+                                             MSG_DONTWAIT | MSG_NOSIGNAL);
+            if (size < 0) {
+                ALOGE("sendAck failure %d", size);
+            }
         }
     }
     return;