diff -Nru xplanet-1.2.1/debian/changelog xplanet-1.2.1/debian/changelog
--- xplanet-1.2.1/debian/changelog	2011-11-08 01:36:36.000000000 +0900
+++ xplanet-1.2.1/debian/changelog	2011-11-25 00:46:37.000000000 +0900
@@ -1,3 +1,10 @@
+xplanet (1.2.1-4.2) unstable; urgency=low
+
+  * Non-maintainer upload.
+  * Fix FTBFS with libpng 1.5.
+
+ -- Nobuhiro Iwamatsu <iwamatsu@nigauri.org>  Fri, 25 Nov 2011 00:46:25 +0900
+
 xplanet (1.2.1-4.1) unstable; urgency=low
 
   * Non-maintainer upload.
diff -Nru xplanet-1.2.1/debian/control xplanet-1.2.1/debian/control
--- xplanet-1.2.1/debian/control	2011-11-08 01:36:20.000000000 +0900
+++ xplanet-1.2.1/debian/control	2011-11-25 00:47:08.000000000 +0900
@@ -3,7 +3,7 @@
 Priority: optional
 Maintainer: Ruben Molina <rmolina@udea.edu.co>
 Build-Depends: debhelper (>= 7), autotools-dev,
- libjpeg-dev, libpng12-dev | libpng-dev, libfreetype6-dev,
+ libjpeg-dev, libpng-dev (>= 1.5), libfreetype6-dev,
  libtiff4-dev, libgif-dev, libnetpbm10-dev, libpango1.0-dev,
  libx11-dev, libxss-dev, libxt-dev, ttf-freefont
 Standards-Version: 3.9.1
diff -Nru xplanet-1.2.1/debian/patches/libpng15.patch xplanet-1.2.1/debian/patches/libpng15.patch
--- xplanet-1.2.1/debian/patches/libpng15.patch	1970-01-01 09:00:00.000000000 +0900
+++ xplanet-1.2.1/debian/patches/libpng15.patch	2011-11-25 00:54:56.000000000 +0900
@@ -0,0 +1,41 @@
+Description: <short summary of the patch>
+ TODO: Put a short summary on the line above and replace this paragraph
+ with a longer explanation of this change. Complete the meta-information
+ with other relevant fields (see below for details). To make it easier, the
+ information below has been extracted from the changelog. Adjust it or drop
+ it.
+ .
+ xplanet (1.2.1-4.2) unstable; urgency=low
+ .
+   * Non-maintainer upload.
+   * Fix FTBFS with libpng 1.5.
+Author: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
+
+---
+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>
+
+--- xplanet-1.2.1.orig/src/libimage/png.c
++++ xplanet-1.2.1/src/libimage/png.c
+@@ -56,8 +56,11 @@ read_png(const char *filename, int *widt
+         fclose(infile);
+         return(0);
+     }
+-  
++#if PNG_LIBPNG_VER_MAJOR >= 1 && PNG_LIBPNG_VER_MINOR >= 4
++    if (setjmp(png_jmpbuf(png_ptr)))
++#else
+     if (setjmp(png_ptr->jmpbuf))
++#endif
+     {
+         png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp) NULL);
+         fclose(infile);
diff -Nru xplanet-1.2.1/debian/patches/series xplanet-1.2.1/debian/patches/series
--- xplanet-1.2.1/debian/patches/series	2010-12-03 00:43:06.000000000 +0900
+++ xplanet-1.2.1/debian/patches/series	2011-11-25 00:55:19.000000000 +0900
@@ -3,3 +3,4 @@
 gcc44-includes
 hyphen-used-as-minus-sign
 tsc-aspect-ratio
+libpng15.patch