diff --git a/ChangeLog b/ChangeLog
index 78876ef..a170c31 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,4 @@
-2015-03-12  Juergen Knoedlseder  <jurgen.knodlseder@irap.omp.eu>
+2015-03-28  Juergen Knoedlseder  <jurgen.knodlseder@irap.omp.eu>
 
         * Version 1.0.0 released
         ========================
@@ -10,6 +10,7 @@
         Add csobsdef script (#1429)
         Add ctulimit tool (#1363)
         Allow ctmodel usage for stacked analysis from command line
+        Correct rate check in ctobssim for map cubes (#1452)
 
 
 2015-01-08  Juergen Knoedlseder  <jurgen.knodlseder@irap.omp.eu>
diff --git a/NEWS b/NEWS
index 57a2cb9..94bcb5b 100644
--- a/NEWS
+++ b/NEWS
@@ -2,7 +2,7 @@ New Features and Important Changes in ctools 1.0.0
 
 Author(s) : Juergen Knoedlseder
 
-12 March 2015
+23 March 2015
 
 
 1. Introduction
@@ -33,7 +33,8 @@ None
 
 5. ctobssim - CTA observation simulation
 ----------------------------------------
-None
+The rate check is now also correctly done for map cubes. Before, the rate check
+made simulations with a diffuse map cube fail (#1452).
 
 
 6. ctselect - CTA event selection