diff --git a/tensorflow/contrib/lite/kernels/register.cc b/tensorflow/contrib/lite/kernels/register.cc
index 0f98154..74d0831 100644
--- a/tensorflow/contrib/lite/kernels/register.cc
+++ b/tensorflow/contrib/lite/kernels/register.cc
@@ -20,7 +20,7 @@ namespace ops {
 
 namespace custom {
 
-TfLiteRegistration* Register_AUDIO_SPECTROGRAM();
+//TfLiteRegistration* Register_AUDIO_SPECTROGRAM();
 TfLiteRegistration* Register_MFCC();
 
 }  // namespace custom
@@ -139,8 +139,8 @@ BuiltinOpResolver::BuiltinOpResolver() {
   // TODO(andrewharp, ahentz): Move these somewhere more appropriate so that
   // custom ops aren't always included by default.
   AddCustom("Mfcc", tflite::ops::custom::Register_MFCC());
-  AddCustom("AudioSpectrogram",
-            tflite::ops::custom::Register_AUDIO_SPECTROGRAM());
+  //AddCustom("AudioSpectrogram",
+  //          tflite::ops::custom::Register_AUDIO_SPECTROGRAM());
 }
 
 TfLiteRegistration* BuiltinOpResolver::FindOp(