Added missing class to __all__.
diff --git a/Lib/imaplib.py b/Lib/imaplib.py
index 91e9cb9..75878b9 100644
--- a/Lib/imaplib.py
+++ b/Lib/imaplib.py
@@ -22,7 +22,7 @@
 
 import binascii, re, socket, time, random, sys
 
-__all__ = ["IMAP4", "Internaldate2tuple",
+__all__ = ["IMAP4", "IMAP4_SSL", "Internaldate2tuple",
            "Int2AP", "ParseFlags", "Time2Internaldate"]
 
 #       Globals