diff --git a/HISTORY.md b/HISTORY.md
index 485de03915..9b1ac0028e 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -13,6 +13,11 @@
 
   * Fixed HMM initial state estimation (#600).
 
+  * Changed versioning macros __MLPACK_VERSION_MAJOR, __MLPACK_VERSION_MINOR,
+    and __MLPACK_VERSION_PATCH to MLPACK_VERSION_MAJOR, MLPACK_VERSION_MINOR,
+    and MLPACK_VERSION_PATCH.  The old names will remain in place until
+    mlpack 3.0.0.
+
 ### mlpack 2.0.1
 ###### 2016-02-04
   * Fix CMake to properly detect when MKL is being used with Armadillo.