diff --git a/dmr_utils/bptc.py b/dmr_utils/bptc.py
index 62ecee0..5fe79e0 100755
--- a/dmr_utils/bptc.py
+++ b/dmr_utils/bptc.py
@@ -217,7 +217,7 @@ if __name__ == '__main__':
         
     # Validation Example
     
-    voice_h = '\x2b\x60\x04\x10\x1f\x84\x2d\xd0\x0d\xf0\x7d\x41\x04\x6d\xff\x57\xd7\x5d\xf5\xde\x30\x15\x2e\x20\x70\xb2\x0f\x80\x3f\x88\xc6\x95\xe2'
+    voice_h = b'\x2b\x60\x04\x10\x1f\x84\x2d\xd0\x0d\xf0\x7d\x41\x04\x6d\xff\x57\xd7\x5d\xf5\xde\x30\x15\x2e\x20\x70\xb2\x0f\x80\x3f\x88\xc6\x95\xe2'
     voice_hb = bitarray(endian='big')
     voice_hb.frombytes(voice_h)
     voice_hb = voice_hb[0:98] + voice_hb[166:264]