diff --git a/src/changes/changes.xml b/src/changes/changes.xml
index 3d5559405..48e56fdd3 100644
--- a/src/changes/changes.xml
+++ b/src/changes/changes.xml
@@ -54,10 +54,10 @@ If the output is not quite correct, check for invisible trailing spaces!
     </release>
 
     <release version="4.0" date="XXXX-XX-XX" description="">
-      <action dev="oertl" type="update" issue="MATH-1220">
+      <action dev="oertl" type="update" issue="MATH-1220"> <!-- backported to 3.6 -->
         Faster generation of Zipf distributed random numbers by using rejection-inversion sampling.
       </action>
-      <action dev="oertl" type="update" issue="MATH-990">
+      <action dev="oertl" type="update" issue="MATH-990"> <!-- backported to 3.6 -->
         Improved performance of sort-in-place methods by avoiding boxing.
       </action>
       <action dev="erans" type="fix" issue="MATH-1261" due-to="Osamu Ikeuchi"> <!-- backported to 3.6 -->