diff --git a/html/changelog.html b/html/changelog.html
index e8f0eca889..beb3f2d31d 100644
--- a/html/changelog.html
+++ b/html/changelog.html
@@ -50,6 +50,12 @@
 		-->
 		<div class="commit sansserif">
 
+			<h2 class="date">23 December 2021</h2>
+			<h3 class="author">Putnam3145 updated:</h3>
+			<ul class="changes bgimages16">
+				<li class="bugfix">Atmos group processing heuristic no longer does opposite of intent</li>
+			</ul>
+
 			<h2 class="date">21 December 2021</h2>
 			<h3 class="author">ShizCalev updated:</h3>
 			<ul class="changes bgimages16">
diff --git a/html/changelogs/.all_changelog.yml b/html/changelogs/.all_changelog.yml
index 50caa2d448..333a33d394 100644
--- a/html/changelogs/.all_changelog.yml
+++ b/html/changelogs/.all_changelog.yml
@@ -30417,3 +30417,6 @@ DO NOT EDIT THIS FILE BY HAND!  AUTOMATICALLY GENERATED BY ss13_genchangelog.py.
       remove when using a screwdriver on it. tweak: Hacking a firing pin out of a
       gun is no longer done via a crafting menu - you can now do it by simply holding
       the gun in your hand and clicking it with a welder/screwdriver/wirecutters.'
+2021-12-23:
+  Putnam3145:
+  - bugfix: Atmos group processing heuristic no longer does opposite of intent
diff --git a/html/changelogs/AutoChangeLog-pr-15420.yml b/html/changelogs/AutoChangeLog-pr-15420.yml
deleted file mode 100644
index e97082f7ca..0000000000
--- a/html/changelogs/AutoChangeLog-pr-15420.yml
+++ /dev/null
@@ -1,4 +0,0 @@
-author: "Putnam3145"
-delete-after: True
-changes: 
-  - bugfix: "Atmos group processing heuristic no longer does opposite of intent"