diff --git a/CHANGELOG b/CHANGELOG
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,10 @@
+propellor (5.6.1) unstable; urgency=medium
+
+  * fix Libvirt.hs haddock build
+    Thanks, Sean Whitton
+
+ -- Joey Hess <id@joeyh.name>  Sun, 20 Jan 2019 19:06:39 -0400
+
 propellor (5.6.0) unstable; urgency=medium
 
   * withOS had a type level bug that allowed ensureProperty to be used inside
diff --git a/debian/changelog b/debian/changelog
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,10 @@
+propellor (5.6.1) unstable; urgency=medium
+
+  * fix Libvirt.hs haddock build
+    Thanks, Sean Whitton
+
+ -- Joey Hess <id@joeyh.name>  Sun, 20 Jan 2019 19:06:39 -0400
+
 propellor (5.6.0) unstable; urgency=medium
 
   * withOS had a type level bug that allowed ensureProperty to be used inside
diff --git a/propellor.cabal b/propellor.cabal
--- a/propellor.cabal
+++ b/propellor.cabal
@@ -1,5 +1,5 @@
 Name: propellor
-Version: 5.6.0
+Version: 5.6.1
 Cabal-Version: 1.20
 License: BSD2
 Maintainer: Joey Hess <id@joeyh.name>
diff --git a/src/Propellor/Property/Libvirt.hs b/src/Propellor/Property/Libvirt.hs
--- a/src/Propellor/Property/Libvirt.hs
+++ b/src/Propellor/Property/Libvirt.hs
@@ -30,7 +30,7 @@
 data AutoStart = AutoStart | NoAutoStart
 
 -- | Which type of disk image to build for the virtual machine
-data DiskImageType = Raw -- | QCow2
+data DiskImageType = Raw -- TODO: | QCow2
 
 -- | Install basic libvirt components
 installed :: Property DebianLike