diff --git a/hplip-deviceIDs-drv.patch b/hplip-deviceIDs-drv.patch
index 8f94f43..10fd1c2 100644
--- a/hplip-deviceIDs-drv.patch
+++ b/hplip-deviceIDs-drv.patch
@@ -1,6 +1,6 @@
 diff -up hplip-3.11.10/prnt/drv/hpcups.drv.in.deviceIDs-drv hplip-3.11.10/prnt/drv/hpcups.drv.in
---- hplip-3.11.10/prnt/drv/hpcups.drv.in.deviceIDs-drv	2011-10-02 05:11:24.000000000 +0200
-+++ hplip-3.11.10/prnt/drv/hpcups.drv.in	2011-10-04 15:48:54.881957881 +0200
+--- hplip-3.11.10/prnt/drv/hpcups.drv.in.deviceIDs-drv	2011-10-02 04:11:24.000000000 +0100
++++ hplip-3.11.10/prnt/drv/hpcups.drv.in	2011-10-07 15:10:17.251249460 +0100
 @@ -458,7 +458,7 @@ Manufacturer "HP"
        ModelName "HP Officejet v40xi"
        Attribute "NickName" "" "HP Officejet v40xi, $Version"
@@ -307,15 +307,6 @@ diff -up hplip-3.11.10/prnt/drv/hpcups.drv.in.deviceIDs-drv hplip-3.11.10/prnt/d
        PCFileName "hp-business_inkjet_2280-pcl3.ppd"
        Attribute "Product" "" "(HP Business Inkjet 2280 Printer)"
        Attribute "Product" "" "(HP Business Inkjet 2280tn Printer)"
-@@ -2508,7 +2508,7 @@ Manufacturer "HP"
-       ModelName "HP PSC 1600 Series"
-       Attribute "NickName" "" "HP PSC 1600 Series, $Version"
-       Attribute "ShortNickName" "" "HP PSC 1600 Series"
--      Attribute "1284DeviceID" "" "MFG:HP;MDL:psc 1600 series;DES:psc 1600 series;"
-+      Attribute "1284DeviceID" "" "MFG:Hewlett-Packard;MDL:psc 1600 series;DES:psc 1600 series;"
-       PCFileName "hp-psc_1600_series.ppd"
-       Attribute "Product" "" "(HP PSC 1600 All-in-one Printer)"
-       Attribute "Product" "" "(HP PSC 1603 All-in-one Printer)"
 @@ -2524,7 +2524,7 @@ Manufacturer "HP"
        ModelName "HP PSC 2200 Series"
        Attribute "NickName" "" "HP PSC 2200 Series, $Version"
@@ -621,6 +612,15 @@ diff -up hplip-3.11.10/prnt/drv/hpcups.drv.in.deviceIDs-drv hplip-3.11.10/prnt/d
        PCFileName "hp-laserjet_1320.ppd"
        Attribute "Product" "" "(HP LaserJet 1320 Printer)"
        Attribute "Product" "" "(HP LaserJet 1320t Printer)"
+@@ -11026,7 +11027,7 @@ Group "RLT/HP Real Life Technologies"
+       ModelName "HP LaserJet m1536dnf MFP"
+       Attribute "NickName" "" "HP LaserJet m1536dnf MFP pcl3, $Version"
+       Attribute "ShortNickName" "" "HP LaserJet m1536dnf MFP"
+-      Attribute "1284DeviceID" "" "MFG:HP;MDL:hp laserjet m1536dnf mfp;DES:hp laserjet m1536dnf mfp;"
++      Attribute "1284DeviceID" "" "MFG:Hewlett-Packard;MDL:hp laserjet m1536dnf mfp;DES:hp laserjet m1536dnf mfp;"
+       PCFileName "hp-laserjet_m1536dnf_mfp-pcl3.ppd"
+       Attribute "Product" "" "(HP LaserJet m1536dnf MFP)"
+     }
 @@ -11098,7 +11099,7 @@ Group "RLT/HP Real Life Technologies"
        ModelName "HP LaserJet p2015 Series"
        Attribute "NickName" "" "HP LaserJet p2015 Series pcl3, $Version"
diff --git a/hplip.spec b/hplip.spec
index c3e14ba..9d0e525 100644
--- a/hplip.spec
+++ b/hplip.spec
@@ -1,7 +1,7 @@
 Summary: HP Linux Imaging and Printing Project
 Name: hplip
 Version: 3.11.10
-Release: 1%{?dist}
+Release: 2%{?dist}
 License: GPLv2+ and MIT
 Group: System Environment/Daemons
 Conflicts: system-config-printer < 0.6.132
@@ -171,6 +171,8 @@ SANE driver for scanners in HP's multi-function devices (from HPOJ).
 # LaserJet Professional P1606dn (bug #708472)
 # LaserJet Professional M1212nf MFP (bug #742490)
 # Officejet 6300 series (bug #689378)
+# LaserJet M1635dnf MFP (bug #743915)
+# PSC 1600 series (bug #743821)
 %patch5 -p1 -b .deviceIDs-drv
 chmod +x %{SOURCE2}
 mv prnt/drv/hpijs.drv.in{,.deviceIDs-drv-hpijs}
@@ -519,6 +521,11 @@ fi
 %postun libs -p /sbin/ldconfig
 
 %changelog
+* Fri Oct  7 2011 Tim Waugh <twaugh@redhat.com> 3.11.10-2
+- Corrected IEEE 1284 Device IDs:
+  - LaserJet M1635dnf MFP (bug #743915)
+  - PSC 1600 series (bug #743821)
+
 * Tue Oct 04 2011 Jiri Popelka <jpopelka@redhat.com> 3.11.10-1
 - 3.11.10
 - Use _cups_serverbin macro from cups-devel for where to put driver executables.