diff --git a/hplip-release-parport.patch b/hplip-release-parport.patch
new file mode 100644
index 0000000..8cb36cc
--- /dev/null
+++ b/hplip-release-parport.patch
@@ -0,0 +1,12 @@
+diff -up hplip-3.12.2/io/hpmud/pp.c.release-parport hplip-3.12.2/io/hpmud/pp.c
+--- hplip-3.12.2/io/hpmud/pp.c.release-parport	2012-02-01 11:53:52.000000000 +0000
++++ hplip-3.12.2/io/hpmud/pp.c	2012-03-21 16:43:31.876908024 +0000
+@@ -1240,6 +1240,8 @@ int __attribute__ ((visibility ("hidden"
+                if (ma.support != HPMUD_SUPPORT_TYPE_HPLIP)
+                {
+                   BUG("ignoring %s support=%d\n", dev, ma.support);
++                  release_pp(fd);
++                  close(fd);
+                   continue;           /* ignor, not supported */
+                }
+ 
diff --git a/hplip.spec b/hplip.spec
index 62130e8..7a770ac 100644
--- a/hplip.spec
+++ b/hplip.spec
@@ -1,7 +1,7 @@
 Summary: HP Linux Imaging and Printing Project
 Name: hplip
 Version: 3.12.2
-Release: 3%{?dist}
+Release: 4%{?dist}
 License: GPLv2+ and MIT
 Group: System Environment/Daemons
 Conflicts: system-config-printer < 0.6.132
@@ -33,6 +33,7 @@ Patch16: hplip-bad-low-ink-warning.patch
 Patch17: hplip-deviceIDs-ppd.patch
 Patch18: hplip-skip-blank-lines.patch
 Patch19: hplip-dbglog-newline.patch
+Patch20: hplip-release-parport.patch
 Patch21: hplip-ppd-ImageableArea.patch
 Patch22: hplip-raw_deviceID-traceback.patch
 Patch23: hplip-UnicodeDecodeError.patch
@@ -249,6 +250,9 @@ done
 # Added missing newline to string argument in dbglog() call (bug #585275).
 %patch19 -p1 -b .dbglog-newline
 
+# Release parport if unsupported model connected (bug #699052).
+%patch20 -p1 -b .release-parport
+
 # Fix ImageableArea for Laserjet 8150/9000 (bug #596298).
 for ppd_file in $(grep '^diff' %{PATCH21} | cut -d " " -f 4);
 do
@@ -515,6 +519,9 @@ fi
 %postun libs -p /sbin/ldconfig
 
 %changelog
+* Wed Mar 21 2012 Tim Waugh <twaugh@redhat.com> 3.12.2-4
+- Release parport if unsupported model connected (bug #699052).
+
 * Wed Feb 29 2012 Tim Waugh <twaugh@redhat.com> 3.12.2-3
 - Added another IEEE 1284 Device ID for Color LaserJet CP2025dn to
   cope with its DNS-SD response, which has no usb_* keys (bug #651509).