diff --git a/Makefile b/Makefile
index a29f8aa..26911b5 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@ RELEASE=4.0
 
 VERSION=4.0
 PACKAGE=libpve-storage-perl
-PKGREL=20
+PKGREL=21
 
 DESTDIR=
 PREFIX=/usr
diff --git a/changelog.Debian b/changelog.Debian
index 563bf74..b27ad47 100644
--- a/changelog.Debian
+++ b/changelog.Debian
@@ -1,3 +1,9 @@
+libpve-storage-perl (4.0-21) unstable; urgency=medium
+
+  * rbd: skip unmap if device is not mapped
+
+ -- Proxmox Support Team <support@proxmox.com>  Thu, 10 Sep 2015 10:43:35 +0200
+
 libpve-storage-perl (4.0-20) unstable; urgency=medium
 
   * rbd free_image: call deactivate_volumes