diff --git a/Changelog b/Changelog
index 8ab66c95..d80ad994 100644
--- a/Changelog
+++ b/Changelog
@@ -1,7 +1,8 @@
 Changelog. A lot less detailed than usual, at least for past
 history.
 	
-2013/03/31: Implement CLONE method for vectors, maps and preconditioners.	
+2013/03/31: Implement CLONE method for vectors, maps and preconditioners.
+	    Make base_prec abstract.      
 	
 2013/03/13: doxygen docs for base_vect. Fix afmt to be len=* in genpde.