diff -Nru qtiplot-0.9.8/debian/changelog qtiplot-0.9.8/debian/changelog
--- qtiplot-0.9.8/debian/changelog	2010-10-07 08:48:22.000000000 +0000
+++ qtiplot-0.9.8/debian/changelog	2010-10-19 15:30:56.000000000 +0000
@@ -1,3 +1,15 @@
+qtiplot (0.9.8-2ubuntu1~ppa3) maverick; urgency=low
+
+  * 01_build_system.diff: Added -lz linkage (LP: #663332)
+
+ -- Alexander Valavanis <valavanisalex@googlemail.com>  Tue, 19 Oct 2010 16:29:53 +0100
+
+qtiplot (0.9.8-2ubuntu1~ppa2) natty; urgency=low
+
+  * Rebuild for natty
+
+ -- Alexander Valavanis <valavanisalex@googlemail.com>  Tue, 19 Oct 2010 14:33:21 +0100
+
 qtiplot (0.9.8-2ubuntu1~ppa1) maverick; urgency=low
 
   * Merge with Debian unstable (LP: #656046).  Remaining changes:
diff -Nru qtiplot-0.9.8/debian/patches/debian-changes-0.9.8-2ubuntu1~ppa3 qtiplot-0.9.8/debian/patches/debian-changes-0.9.8-2ubuntu1~ppa3
--- qtiplot-0.9.8/debian/patches/debian-changes-0.9.8-2ubuntu1~ppa3	1970-01-01 00:00:00.000000000 +0000
+++ qtiplot-0.9.8/debian/patches/debian-changes-0.9.8-2ubuntu1~ppa3	2010-10-19 15:31:13.000000000 +0000
@@ -0,0 +1,36 @@
+Description: Upstream changes introduced in version 0.9.8-2ubuntu1~ppa3
+ This patch has been created by dpkg-source during the package build.
+ Here's the last changelog entry, hopefully it gives details on why
+ those changes were made:
+ .
+ qtiplot (0.9.8-2ubuntu1~ppa3) maverick; urgency=low
+ .
+   * 01_build_system.diff: Added -lz linkage (LP: #663332)
+ .
+ The person named in the Author field signed this changelog entry.
+Author: Alexander Valavanis <valavanisalex@googlemail.com>
+Bug-Ubuntu: https://bugs.launchpad.net/bugs/663332
+
+---
+The information above should follow the Patch Tagging Guidelines, please
+checkout http://dep.debian.net/deps/dep3/ to learn about the format. Here
+are templates for supplementary fields that you might want to add:
+
+Origin: <vendor|upstream|other>, <url of original patch>
+Bug: <url in upstream bugtracker>
+Bug-Debian: http://bugs.debian.org/<bugnumber>
+Bug-Ubuntu: https://launchpad.net/bugs/<bugnumber>
+Forwarded: <no|not-needed|url proving that it has been forwarded>
+Reviewed-By: <name and email of someone who approved the patch>
+Last-Update: <YYYY-MM-DD>
+
+--- qtiplot-0.9.8.orig/qtiplot/qtiplot.pro
++++ qtiplot-0.9.8/qtiplot/qtiplot.pro
+@@ -24,6 +24,7 @@ LIBS         += $$QWT_LIBS
+ LIBS         += $$QWT3D_LIBS
+ LIBS         += $$GSL_LIBS
+ LIBS         += -lorigin2
++LIBS         += -lz
+ 
+ #############################################################################
+ ###################### BASIC PROJECT PROPERTIES #############################
diff -Nru qtiplot-0.9.8/debian/patches/series qtiplot-0.9.8/debian/patches/series
--- qtiplot-0.9.8/debian/patches/series	2010-10-07 08:47:22.000000000 +0000
+++ qtiplot-0.9.8/debian/patches/series	2010-10-19 15:31:13.000000000 +0000
@@ -1,2 +1,3 @@
 01_build_system.diff
 02_fix_paths.diff
+debian-changes-0.9.8-2ubuntu1~ppa3