--- a/NEWS
+++ b/NEWS
@@ -1,4 +1,11 @@
 Summary of important user-visible changes for releases of the mechanics package
+
+===============================================================================
+mechanics-1.3.1   Release Date: 2013-xx-yy   Release Manager: Juan Pablo Carbajal
+===============================================================================
+
+* Functions with bug fixes
+  rodmassmatrix: density function was assumed to be normalized. Now any density function should give the correct result for "s".
 
 ===============================================================================
 mechanics-1.3.0   Release Date: 2012-24-08   Release Manager: Juan Pablo Carbajal