diff --git a/media/libmedia/AudioTrack.cpp b/media/libmedia/AudioTrack.cpp
index 0609a22..0b8fd7e 100644
--- a/media/libmedia/AudioTrack.cpp
+++ b/media/libmedia/AudioTrack.cpp
@@ -878,6 +878,12 @@
     }
     ALOGV("createTrack_l() output %d afLatency %d", output, afLatency);
 
+    if ((flags & AUDIO_OUTPUT_FLAG_FAST) && sampleRate != afSampleRate) {
+        ALOGW("AUDIO_OUTPUT_FLAG_FAST denied by client due to mismatching sample rate (%d vs %d)",
+              sampleRate, afSampleRate);
+        flags = (audio_output_flags_t) (flags & ~AUDIO_OUTPUT_FLAG_FAST);
+    }
+
     // The client's AudioTrack buffer is divided into n parts for purpose of wakeup by server, where
     //  n = 1   fast track with single buffering; nBuffering is ignored
     //  n = 2   fast track with double buffering
diff --git a/services/audioflinger/Configuration.h b/services/audioflinger/Configuration.h
index bc2038a..0754d9d 100644
--- a/services/audioflinger/Configuration.h
+++ b/services/audioflinger/Configuration.h
@@ -32,9 +32,6 @@
 // uncomment to enable fast mixer to take performance samples for later statistical analysis
 #define FAST_MIXER_STATISTICS
 
-// uncomment to allow fast tracks at non-native sample rate
-//#define FAST_TRACKS_AT_NON_NATIVE_SAMPLE_RATE
-
 // uncomment for debugging timing problems related to StateQueue::push()
 //#define STATE_QUEUE_DUMP
 
diff --git a/services/audioflinger/Threads.cpp b/services/audioflinger/Threads.cpp
index 73429ec..072e5fd 100644
--- a/services/audioflinger/Threads.cpp
+++ b/services/audioflinger/Threads.cpp
@@ -1218,10 +1218,8 @@
             // mono or stereo
             ( (channelMask == AUDIO_CHANNEL_OUT_MONO) ||
               (channelMask == AUDIO_CHANNEL_OUT_STEREO) ) &&
-#ifndef FAST_TRACKS_AT_NON_NATIVE_SAMPLE_RATE
             // hardware sample rate
             (sampleRate == mSampleRate) &&
-#endif
             // normal mixer has an associated fast mixer
             hasFastMixer() &&
             // there are sufficient fast track slots available