diff --git a/tensorflow/core/lib/wav/wav_io.cc b/tensorflow/core/lib/wav/wav_io.cc
index d318059e8f6..592ab2bd2a5 100644
--- a/tensorflow/core/lib/wav/wav_io.cc
+++ b/tensorflow/core/lib/wav/wav_io.cc
@@ -235,7 +235,8 @@ Status DecodeLin16WaveAsFloatVector(const string& wav_string,
       ReadValue<uint32>(wav_string, &format_chunk_size, &offset));
   if ((format_chunk_size != 16) && (format_chunk_size != 18)) {
     return errors::InvalidArgument(
-        "Bad file size for WAV: Expected 16 or 18, but got", format_chunk_size);
+        "Bad format chunk size for WAV: Expected 16 or 18, but got",
+        format_chunk_size);
   }
   uint16 audio_format;
   TF_RETURN_IF_ERROR(ReadValue<uint16>(wav_string, &audio_format, &offset));