diff --git a/hgext/eol.py b/hgext/eol.py
--- a/hgext/eol.py
+++ b/hgext/eol.py
@@ -66,6 +66,11 @@ like the deprecated win32text extension 
 disable win32text and enable eol and your filters will still work. You
 only need to these filters until you have prepared a ``.hgeol`` file.
 
+The ``win32text.forbid*`` hooks provided by the win32text extension
+have been unified into a single hook named ``eol.hook``. The hook will
+lookup the expected line endings from the ``.hgeol`` file, which means
+you must migrate to a ``.hgeol`` file first before using the hook.
+
 See :hg:`help patterns` for more information about the glob patterns
 used.
 """