diff --git a/HISTORY.md b/HISTORY.md
index 3ba0458995..23bf3050a2 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -1,5 +1,7 @@
 ### mlpack ?.?.?
 ###### ????-??-??
+  * Reinforcement Learning: Ornstein-Uhlenbeck noise (#3499).
+  
   * Reinforcement Learning: Deep Deterministic Policy Gradient (#3494).
   
 ### mlpack 4.2.0