diff --git a/Makefile b/Makefile
index 654e1bb..af13ec8 100644
--- a/Makefile
+++ b/Makefile
@@ -14,7 +14,7 @@
 #
 TMP        ?= /tmp
 DIST_PREFIX = ${TMP}
-VERSION     = 4.3.1
+VERSION     = 4.3.1+dev
 DEBVERSION  = $(shell echo $(VERSION)|sed 's/\(rc\|pre\|beta\|alpha\)/~\1/')
 BASE        = xen-tools
 VCS         = git
diff --git a/bin/xen-create-image b/bin/xen-create-image
index 242c515..22038d2 100755
--- a/bin/xen-create-image
+++ b/bin/xen-create-image
@@ -822,7 +822,7 @@ my $FAIL = 0;
 #
 # Release number.
 #
-my $RELEASE = '4.3.1';
+my $RELEASE = '4.3.1+dev';
 
 
 #
diff --git a/bin/xen-create-nfs b/bin/xen-create-nfs
index 2295b94..0d8140d 100755
--- a/bin/xen-create-nfs
+++ b/bin/xen-create-nfs
@@ -131,7 +131,7 @@ $CONFIG{ 'template' } = '/etc/xen-tools/xm-nfs.tmpl';
 #
 # Release number.
 #
-my $RELEASE = '4.3.1';
+my $RELEASE = '4.3.1+dev';
 
 
 # store version number away.
diff --git a/bin/xen-delete-image b/bin/xen-delete-image
index 00fd2ed..ad3320e 100755
--- a/bin/xen-delete-image
+++ b/bin/xen-delete-image
@@ -171,7 +171,7 @@ my %CONFIG;
 #
 # Release number.
 #
-my $RELEASE = '4.3.1';
+my $RELEASE = '4.3.1+dev';
 
 
 
diff --git a/bin/xen-list-images b/bin/xen-list-images
index 0d90a42..a2b1c26 100755
--- a/bin/xen-list-images
+++ b/bin/xen-list-images
@@ -101,7 +101,7 @@ $CONFIG{ 'prefix' } = "/etc/xen";
 #
 # Release number.
 #
-my $RELEASE = '4.3.1';
+my $RELEASE = '4.3.1+dev';
 
 
 
diff --git a/bin/xen-resize-guest b/bin/xen-resize-guest
index 12f8e5e..88edd9e 100755
--- a/bin/xen-resize-guest
+++ b/bin/xen-resize-guest
@@ -116,7 +116,7 @@ my %CONFIG;
 #
 # Release number.
 #
-my $RELEASE = '4.3.1';
+my $RELEASE = '4.3.1+dev';
 
 
 
diff --git a/bin/xen-update-image b/bin/xen-update-image
index 6c6deef..747f405 100755
--- a/bin/xen-update-image
+++ b/bin/xen-update-image
@@ -120,7 +120,7 @@ my %CONFIG;
 #
 # Release number.
 #
-my $RELEASE = '4.3.1';
+my $RELEASE = '4.3.1+dev';
 
 
 #
diff --git a/bin/xt-create-xen-config b/bin/xt-create-xen-config
index dbf560f..cddc865 100755
--- a/bin/xt-create-xen-config
+++ b/bin/xt-create-xen-config
@@ -156,7 +156,7 @@ $CONFIG{ 'extension' } = '.cfg';
 #
 # Release number.
 #
-my $RELEASE = '4.3.1';
+my $RELEASE = '4.3.1+dev';
 
 
 
diff --git a/bin/xt-customize-image b/bin/xt-customize-image
index 2af25f5..dcb3fd5 100755
--- a/bin/xt-customize-image
+++ b/bin/xt-customize-image
@@ -98,7 +98,7 @@ my %CONFIG;
 #
 # Release number.
 #
-my $RELEASE = '4.3.1';
+my $RELEASE = '4.3.1+dev';
 
 
 
diff --git a/bin/xt-guess-suite-and-mirror b/bin/xt-guess-suite-and-mirror
index 0894ee1..c8a79d5 100755
--- a/bin/xt-guess-suite-and-mirror
+++ b/bin/xt-guess-suite-and-mirror
@@ -81,7 +81,7 @@ use strict;
 #
 # Release number.
 #
-my $RELEASE = '4.3.1';
+my $RELEASE = '4.3.1+dev';
 
 # Init
 my $mirror = '';
diff --git a/bin/xt-install-image b/bin/xt-install-image
index 63299e9..b8ecddd 100755
--- a/bin/xt-install-image
+++ b/bin/xt-install-image
@@ -118,7 +118,7 @@ my %CONFIG;
 #
 # Release number.
 #
-my $RELEASE = '4.3.1';
+my $RELEASE = '4.3.1+dev';
 
 
 #
diff --git a/debian/changelog b/debian/changelog
index ed8fc83..2b392de 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+xen-tools (4.3.1+dev-1) UNRELEASED; urgency=low
+
+  * New upstream release
+
+ -- Axel Beckert <abe@debian.org>  Tue, 13 Nov 2012 18:05:05 +0100
+
 xen-tools (4.3.1-1) unstable; urgency=low
 
   * Remove t/modules.t in upstream's t/Makefile instead of debian/rules'