diff --git a/HISTORY.md b/HISTORY.md
index 5acdedcb4f..a250c1ec98 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -4,6 +4,8 @@
 
   * Added Softmin activation function as layer in ann/layer.
 
+  * Fix spurious ARMA_64BIT_WORD compilation warnings on 32-bit systems.
+
 ### mlpack 3.4.1
 ###### 2020-09-07
   * Fix incorrect parsing of required matrix/model parameters for command-line