Index: Lib/ftplib.py
===================================================================
--- Lib/ftplib.py	(révision 74555)
+++ Lib/ftplib.py	(copie de travail)
@@ -473,10 +473,10 @@
         while 1:
             buf = fp.readline()
             if not buf: break
-            if buf[-2:] != B_CRLF:
-                if buf[-1] in B_CRLF: buf = buf[:-1]
-                buf = buf + B_CRLF
-            conn.sendall(buf)
+            if buf[-2:] != CRLF:
+                if buf[-1] in CRLF: buf = buf[:-1]
+                buf = buf + CRLF
+            conn.sendall(bytes(buf, self.encoding))
             if callback: callback(buf)
         conn.close()
         return self.voidresp()