diff --git a/CHANGELOG.md b/CHANGELOG.md
index 619e154..cec006c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@
         - **.PATCH**: Pull Request Title (PR Author) [PR Number](Link to PR)
 -->
 #### 6.4
+- **.1**: Ensure backward compatibility. v:t_func is not available before Vim 8.0 (Phil Runninger)
 - **.0**: Allow use of function references as callbacks (HiPhish) [#1067](https://github.com/scrooloose/nerdtree/pull/1067)
 #### 6.3
 - **.0**: Add new command that behaves like NERDTreeToggle but defaults to the root of a VCS repository. (willfindlay) [#1060](https://github.com/scrooloose/nerdtree/pull/1060)