diff --git a/docs/zr_3.0-b2-patch_changelog.txt b/docs/zr_3.0-b2-patch_changelog.txt
index 191ea20..0b148d2 100644
--- a/docs/zr_3.0-b2-patch_changelog.txt
+++ b/docs/zr_3.0-b2-patch_changelog.txt
@@ -209,3 +209,8 @@ released. If the file is empty there are no config changes in that patch.
 -----------------
 
 * Updated gamedata file. Thanks to pillepallus.
+
+2011.12.26 - r673
+-----------------
+
+* Added infection countdown. Backported from zr-dev:52955b169945 (655).
diff --git a/patchlist.conf b/patchlist.conf
index 3786c44..9f76ed7 100644
--- a/patchlist.conf
+++ b/patchlist.conf
@@ -20,3 +20,4 @@
 666
 669
 671
+673