diff --git a/python/convertrules.py b/python/convertrules.py
index f86165c..d431bf6 100644
--- a/python/convertrules.py
+++ b/python/convertrules.py
@@ -2860,6 +2860,12 @@ chord-shape call.\n"))
         raise FatalConversionError ()
     return str
 
address@hidden ((2, 12, 0), "Bump verison for release")
+def conv(str)
+        stderr_write ("\n")
+        stderr_write (FROM_TO % ("bump version for release.\n"))
+    return str
+
 # Guidelines to write rules (please keep this at the end of this file)
 #
 # - keep at most one rule per version; if several conversions should be done,