diff --git a/Lib/multifile.py b/Lib/multifile.py
index e82a3fd..35b0200 100644
--- a/Lib/multifile.py
+++ b/Lib/multifile.py
@@ -26,6 +26,10 @@
 current file part.  This may be useful when using MultiFile with a non-
 seekable stream object.
 """
+from warnings import warn
+warn("the multifile module has been deprecated since Python 2.5",
+        DeprecationWarning, stacklevel=2)
+del warn
 
 __all__ = ["MultiFile","Error"]