diff --git a/bin/b64.py b/bin/b64.py
index 2cee83e..f2ac074 100644
--- a/bin/b64.py
+++ b/bin/b64.py
@@ -92,7 +92,7 @@ def stream(self, records):
             def fct(s):
                 # Fix padding
                 if self.fix_padding:
-                    s += b"==="
+                    s += "==="
                 s = b64decode(s)
                 return s.decode(self.encoding, errors=errors)
         else: