diff --git a/CHANGELOG b/CHANGELOG
index b04d5f0..8ed202b 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -65,4 +65,5 @@
 - Bug: relational script installed with debian package now passes arguments to the python executable
 - Insert and delete from GUI are now done on the displayed relation, not on the selected one
 
-0.10
\ No newline at end of file
+0.10
+- In optimizer, added a function that tokenizes an expression