diff -Nru foo2zjs-20171202dfsg0/debian/changelog foo2zjs-20171202dfsg0/debian/changelog
--- foo2zjs-20171202dfsg0/debian/changelog	2020-01-18 11:37:30.000000000 +0000
+++ foo2zjs-20171202dfsg0/debian/changelog	2020-01-30 20:30:51.000000000 +0000
@@ -1,3 +1,13 @@
+foo2zjs (20171202dfsg0-4) unstable; urgency=medium
+
+  [ Didier Raboud ]
+  * Bump Standards-Version to 4.5.0 without changes needed
+
+  [ Sam Morris ]
+  * Re-enable manual duplex printing for Samsung CLP 300 (Closes: #627542)
+
+ -- Didier Raboud <odyx@debian.org>  Thu, 30 Jan 2020 21:30:51 +0100
+
 foo2zjs (20171202dfsg0-3) unstable; urgency=medium
 
   [ Didier Raboud ]
diff -Nru foo2zjs-20171202dfsg0/debian/control foo2zjs-20171202dfsg0/debian/control
--- foo2zjs-20171202dfsg0/debian/control	2020-01-18 11:37:30.000000000 +0000
+++ foo2zjs-20171202dfsg0/debian/control	2020-01-30 20:30:51.000000000 +0000
@@ -13,7 +13,7 @@
                time,
                pyppd (>= 1.0.2-1~),
                libjbig-dev
-Standards-Version: 4.4.1
+Standards-Version: 4.5.0
 Vcs-Browser: https://salsa.debian.org/printing-team/foo2zjs
 Vcs-Git: https://salsa.debian.org/printing-team/foo2zjs.git
 Homepage: http://foo2zjs.rkkda.com/
diff -Nru foo2zjs-20171202dfsg0/debian/patches/0025-Re-enable-manual-duplex-printing-for-Samsung-CLP-300.patch foo2zjs-20171202dfsg0/debian/patches/0025-Re-enable-manual-duplex-printing-for-Samsung-CLP-300.patch
--- foo2zjs-20171202dfsg0/debian/patches/0025-Re-enable-manual-duplex-printing-for-Samsung-CLP-300.patch	1970-01-01 00:00:00.000000000 +0000
+++ foo2zjs-20171202dfsg0/debian/patches/0025-Re-enable-manual-duplex-printing-for-Samsung-CLP-300.patch	2020-01-30 20:30:51.000000000 +0000
@@ -0,0 +1,55 @@
+From: Sam Morris <sam@robots.org.uk>
+Date: Wed, 5 Jun 2013 18:33:08 +0100
+Subject: Re-enable manual duplex printing for Samsung CLP 300
+
+Closes: #627542
+---
+ foomatic-db/opt/foo2qpdl-Duplex.xml | 23 ++++++++++++++++++++---
+ 1 file changed, 20 insertions(+), 3 deletions(-)
+
+diff --git a/foomatic-db/opt/foo2qpdl-Duplex.xml b/foomatic-db/opt/foo2qpdl-Duplex.xml
+index 9887b1f..6e727af 100644
+--- a/foomatic-db/opt/foo2qpdl-Duplex.xml
++++ b/foomatic-db/opt/foo2qpdl-Duplex.xml
+@@ -16,9 +16,6 @@
+ 	    <driver>foo2qpdl</driver>
+ 	    <arg_defval>ev/foo2qpdl-Duplex-1</arg_defval>
+ 	</constraint>
+-	<constraint sense="false">
+-	    <make>Samsung</make> <model>CLP-300</model>
+-	</constraint>
+ 	<constraint sense="false">
+ 	    <make>Samsung</make> <model>CLP-310</model>
+ 	</constraint>
+@@ -57,11 +54,31 @@
+ 	    <ev_longname> <en>Long Edge (Standard)</en> </ev_longname>
+ 	    <ev_shortname> <en>DuplexNoTumble</en> </ev_shortname>
+ 	    <ev_driverval>2</ev_driverval>
++	    <constraints>
++		<constraint sense="false">
++		    <make>Samsung</make> <model>CLP-300</model>
++		</constraint>
++	    </constraint>
+ 	</enum_val>
+ 	<enum_val id="ev/foo2qpdl-Duplex-3">
+ 	    <ev_longname> <en>Short Edge (Flip)</en> </ev_longname>
+ 	    <ev_shortname> <en>DuplexTumble</en> </ev_shortname>
+ 	    <ev_driverval>3</ev_driverval>
++	    <constraints>
++		<constraint sense="false">
++		    <make>Samsung</make> <model>CLP-300</model>
++		</constraint>
++	    </constraint>
++	</enum_val>
++	<enum_val id="ev/foo2qpdl-Duplex-4">
++	    <ev_longname> <en>Manual Long Edge (Standard)</en> </ev_longname>
++	    <ev_shortname> <en>ManualDuplexNoTumble</en> </ev_shortname>
++	    <ev_driverval>4</ev_driverval>
++	</enum_val>
++	<enum_val id="ev/foo2qpdl-Duplex-5">
++	    <ev_longname> <en>Manual Short Edge (Flip)</en> </ev_longname>
++	    <ev_shortname> <en>ManualDuplexTumble</en> </ev_shortname>
++	    <ev_driverval>5</ev_driverval>
+ 	</enum_val>
+     </enum_vals>
+ </option>
diff -Nru foo2zjs-20171202dfsg0/debian/patches/series foo2zjs-20171202dfsg0/debian/patches/series
--- foo2zjs-20171202dfsg0/debian/patches/series	2020-01-18 11:37:30.000000000 +0000
+++ foo2zjs-20171202dfsg0/debian/patches/series	2020-01-30 20:30:51.000000000 +0000
@@ -22,3 +22,4 @@
 0022-Don-t-try-to-install-hotplug-osx-on-all-UNAME-s.patch
 0023-Don-t-test-for-stdio.h-in-fullpath.patch
 0024-Drop-lsomelib-make-dependencies-to-progress-towards-.patch
+0025-Re-enable-manual-duplex-printing-for-Samsung-CLP-300.patch