diff --git a/services/audioflinger/AudioMixer.cpp b/services/audioflinger/AudioMixer.cpp
index 7c7fa56..1167115 100644
--- a/services/audioflinger/AudioMixer.cpp
+++ b/services/audioflinger/AudioMixer.cpp
@@ -50,8 +50,8 @@
     mState.enabledTracks= 0;
     mState.needsChanged = 0;
     mState.frameCount   = frameCount;
-    mState.outputTemp   = 0;
-    mState.resampleTemp = 0;
+    mState.outputTemp   = NULL;
+    mState.resampleTemp = NULL;
     mState.hook         = process__nop;
     track_t* t = mState.tracks;
     for (int i=0 ; i<32 ; i++) {
@@ -67,11 +67,11 @@
         t->format = 16;
         t->channelMask = AUDIO_CHANNEL_OUT_STEREO;
         t->buffer.raw = 0;
-        t->bufferProvider = 0;
-        t->hook = 0;
-        t->resampler = 0;
+        t->bufferProvider = NULL;
+        t->hook = NULL;
+        t->resampler = NULL;
         t->sampleRate = mSampleRate;
-        t->in = 0;
+        t->in = NULL;
         t->mainBuffer = NULL;
         t->auxBuffer = NULL;
         t++;
@@ -127,7 +127,7 @@
         if (track.resampler) {
             // delete  the resampler
             delete track.resampler;
-            track.resampler = 0;
+            track.resampler = NULL;
             track.sampleRate = mSampleRate;
             invalidateState(1<<name);
         }
@@ -290,7 +290,7 @@
     if (value!=devSampleRate || resampler) {
         if (sampleRate != value) {
             sampleRate = value;
-            if (resampler == 0) {
+            if (resampler == NULL) {
                 resampler = AudioResampler::create(
                         format, channelCount, devSampleRate);
             }
@@ -302,12 +302,12 @@
 
 bool AudioMixer::track_t::doesResample() const
 {
-    return resampler != 0;
+    return resampler != NULL;
 }
 
 void AudioMixer::track_t::resetResampler()
 {
-    if (resampler != 0) {
+    if (resampler != NULL) {
         resampler->reset();
     }
 }
@@ -430,11 +430,11 @@
         } else {
             if (state->outputTemp) {
                 delete [] state->outputTemp;
-                state->outputTemp = 0;
+                state->outputTemp = NULL;
             }
             if (state->resampleTemp) {
                 delete [] state->resampleTemp;
-                state->resampleTemp = 0;
+                state->resampleTemp = NULL;
             }
             state->hook = process__genericNoResampling;
             if (all16BitsStereoNoResample && !volumeRamp) {