diff --git a/ndev/asr.py b/ndev/asr.py
index 7bddcac..fa0cb13 100644
--- a/ndev/asr.py
+++ b/ndev/asr.py
@@ -350,7 +350,7 @@ def __read_wav_file_in_chunks(filepath):
 		print "  Audio File          %s" % filepath
 		data = file_to_play.readframes(ASR.chunk_size)
 		total_chunks = 0
-		while data != '':
+		while data != b'':
 			total_chunks += len(data)
 			stdout.write("\r  Bytes Sent          %d/%d \t%d%% " % (total_chunks,total_size,100*total_chunks/total_size))
 			stdout.flush()