diff --git a/debian/changelog b/debian/changelog
index 101ea00..63d7607 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -3,6 +3,8 @@ propellor (1.2.0) UNRELEASED; urgency=medium
   * Display a warning when ensureProperty is used on a property which has
     Info and is so prevented from propigating it.
   * Removed boolProperty; instead the new toResult can be used. (API change)
+  * Include Propellor.Property.OS, which was accidentially left out of the
+    cabal file in the last release.
 
  -- Joey Hess <id@joeyh.name>  Sun, 07 Dec 2014 17:08:55 -0400
 
diff --git a/propellor.cabal b/propellor.cabal
index f3f1c53..b0ead4b 100644
--- a/propellor.cabal
+++ b/propellor.cabal
@@ -90,6 +90,7 @@ Library
     Propellor.Property.Nginx
     Propellor.Property.Obnam
     Propellor.Property.OpenId
+    Propellor.Property.OS
     Propellor.Property.Postfix
     Propellor.Property.Prosody
     Propellor.Property.Reboot