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diff --git a/Changelog b/Changelog
index b8461c4..85e4cad 100644
--- a/Changelog
+++ b/Changelog
@@ -4,6 +4,8 @@ Development version
   in tail-recursive style.
 - Reduced memory requirements of constant propagation pass by forgetting
   compile-time approximations of dead variables.
+- More aggressive common subexpression elimination across some builtin
+  function calls, esp. annotations.
 
 
 Release 1.13, 2013-03-12