diff --git a/CHANGELOG.md b/CHANGELOG.md
index 453bc0be08..84cea3f562 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -36,6 +36,7 @@ release.
 ## [Unreleased]
 
 ### Changed
+- Explode has been refactored to be callable; the one old Makefile test has been removed and replaced by a gtest. Issue: [#5557](https://github.com/USGS-Astrogeology/ISIS3/issues/5557)
 - Changed `qwt` dependency version to 6.2.0 or below [#5498](https://github.com/DOI-USGS/ISIS3/issues/5498)
 - Pinned `suitesparse` dependency version to maximum not including 7.7.0 [#5496](https://github.com/DOI-USGS/ISIS3/issues/5496)