diff --git a/debian/changelog b/debian/changelog
index 1cf2713..896ed5c 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -10,6 +10,8 @@
   * debian/copyright: Refer to the GPL-2 in /usr/share/common-licenses
   * Use XZ compression for the upstream tarball
   * debian/rules: Install the upstream changelog
+  * Generate Java 6 compatible bytecode
+  * Include the debug informations in the compiled classes
 
  -- Emmanuel Bourg <ebourg@apache.org>  Mon, 07 Oct 2013 08:46:56 +0200
 
diff --git a/debian/rules b/debian/rules
index 3b79e85..3e5bddd 100755
--- a/debian/rules
+++ b/debian/rules
@@ -16,6 +16,8 @@
 DEB_DH_INSTALL_SOURCEDIR = debian/tmp
 DEB_COMPRESS_EXCLUDE = .java
 DEB_INSTALL_CHANGELOGS_ALL := Changelog.txt
+
+export JFLAGS = -source 1.6 -target 1.6 -g
 
 install/libjmagick6-java::
 	mkdir -p $(DEB_DESTDIR)/usr/share/java