diff --git a/libs/gui/SensorEventQueue.cpp b/libs/gui/SensorEventQueue.cpp
index 3396f25..7eb6da5 100644
--- a/libs/gui/SensorEventQueue.cpp
+++ b/libs/gui/SensorEventQueue.cpp
@@ -86,7 +86,7 @@
     Mutex::Autolock _l(mLock);
     if (mPollLoop == 0) {
         mPollLoop = new PollLoop(true);
-        mPollLoop->setCallback(getFd(), POLLIN, NULL, NULL);
+        mPollLoop->setCallback(getFd(), getFd(), POLLIN, NULL, NULL);
     }
     return mPollLoop;
 }
diff --git a/libs/utils/PollLoop.cpp b/libs/utils/PollLoop.cpp
index f740fa0..6d3eeee 100644
--- a/libs/utils/PollLoop.cpp
+++ b/libs/utils/PollLoop.cpp
@@ -95,6 +95,7 @@
     RequestedCallback requestedCallback;
     requestedCallback.callback = NULL;
     requestedCallback.looperCallback = NULL;
+    requestedCallback.ident = 0;
     requestedCallback.data = NULL;
     mRequestedCallbacks.insertAt(requestedCallback, 0);
 }
@@ -116,7 +117,7 @@
         mPendingFdsPos++;
         if (outEvents != NULL) *outEvents = pending.events;
         if (outData != NULL) *outData = pending.data;
-        return pending.fd;
+        return pending.ident;
     }
     
     mLock.lock();
@@ -182,6 +183,7 @@
             const RequestedCallback& requestedCallback = mRequestedCallbacks.itemAt(i);
             PendingCallback pending;
             pending.fd = requestedFd.fd;
+            pending.ident = requestedCallback.ident;
             pending.events = revents;
             pending.callback = requestedCallback.callback;
             pending.looperCallback = requestedCallback.looperCallback;
@@ -191,7 +193,7 @@
                 mPendingCallbacks.push(pending);
             } else if (pending.fd != mWakeReadPipeFd) {
                 if (result == POLL_CALLBACK) {
-                    result = pending.fd;
+                    result = pending.ident;
                     if (outEvents != NULL) *outEvents = pending.events;
                     if (outData != NULL) *outData = pending.data;
                 } else {
@@ -268,16 +270,20 @@
     return mAllowNonCallbacks;
 }
 
+void PollLoop::setCallback(int fd, int ident, int events, Callback callback, void* data) {
+    setCallbackCommon(fd, ident, events, callback, NULL, data);
+}
+
 void PollLoop::setCallback(int fd, int events, Callback callback, void* data) {
-    setCallbackCommon(fd, events, callback, NULL, data);
+    setCallbackCommon(fd, POLL_CALLBACK, events, callback, NULL, data);
 }
 
-void PollLoop::setLooperCallback(int fd, int events, ALooper_callbackFunc* callback,
+void PollLoop::setLooperCallback(int fd, int ident, int events, ALooper_callbackFunc* callback,
         void* data) {
-    setCallbackCommon(fd, events, NULL, callback, data);
+    setCallbackCommon(fd, ident, events, NULL, callback, data);
 }
 
-void PollLoop::setCallbackCommon(int fd, int events, Callback callback,
+void PollLoop::setCallbackCommon(int fd, int ident, int events, Callback callback,
         ALooper_callbackFunc* looperCallback, void* data) {
 
 #if DEBUG_CALLBACKS
@@ -305,6 +311,7 @@
     RequestedCallback requestedCallback;
     requestedCallback.callback = callback;
     requestedCallback.looperCallback = looperCallback;
+    requestedCallback.ident = ident;
     requestedCallback.data = data;
 
     ssize_t index = getRequestIndexLocked(fd);