diff --git a/jlatexmath-1.0.3-nosource.patch b/jlatexmath-1.0.3-nosource.patch
new file mode 100644
index 0000000..dbbd64f
--- /dev/null
+++ b/jlatexmath-1.0.3-nosource.patch
@@ -0,0 +1,19 @@
+--- jlatexmath-1.0.3/plugin/fop/build.xml	2014-02-09 18:30:10.000000000 +0100
++++ jlatexmath-1.0.3/plugin/fop/build.xml	2017-09-19 10:27:38.975496694 +0200
+@@ -62,14 +62,14 @@
+   
+   <!-- Compile source files -->
+   <target name="compile" depends="init,buildJLM,checkXGC,checkFOP">
+-    <javac srcdir="${project.src.dir}" destdir="${project.bin.dir}" debug="on" source="5" target="5">
++    <javac srcdir="${project.src.dir}" destdir="${project.bin.dir}" debug="on" source="${java_version}" target="${java_version}">
+       <!--compilerarg value="-Xlint"/-->
+       <classpath refid="libs-build-classpath"/>
+     </javac>
+   </target>
+   
+   <target name="embedded" depends="init,checkXGC,checkFOP">
+-    <javac srcdir="${project.src.dir}" destdir="${jlm.base.dir}/bin" debug="on" source="5" target="5">
++    <javac srcdir="${project.src.dir}" destdir="${jlm.base.dir}/bin" debug="on" source="${java_version}" target="${java_version}">
+       <!--compilerarg value="-Xlint"/-->
+       <classpath refid="libs-build-classpath"/>
+     </javac>
diff --git a/jlatexmath.changes b/jlatexmath.changes
index 4dfe8a8..373b6b2 100644
--- a/jlatexmath.changes
+++ b/jlatexmath.changes
@@ -1,3 +1,12 @@
+-------------------------------------------------------------------
+Tue Sep 19 08:31:24 UTC 2017 - fstrba@suse.com
+
+- Fix build with jdk9: specify java source and target level 1.6
+- Added patch:
+  * jlatexmath-1.0.3-nosource.patch
+    + Don't hardcode java source and target level; we specify them
+      on command-line
+
 -------------------------------------------------------------------
 Fri Jun 27 14:26:28 UTC 2014 - tchvatal@suse.com
 
diff --git a/jlatexmath.spec b/jlatexmath.spec
index 5f581b9..2228915 100644
--- a/jlatexmath.spec
+++ b/jlatexmath.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package jlatexmath
 #
-# Copyright (c) 2014 SUSE LINUX Products GmbH, Nuernberg, Germany.
+# Copyright (c) 2017 SUSE LINUX GmbH, Nuernberg, Germany.
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -20,19 +20,21 @@ Name:           jlatexmath
 Version:        1.0.3
 Release:        0
 Summary:        Java API to display mathematical formulas written in LaTeX
+# FIXME: use correct group, see "https://en.opensuse.org/openSUSE:Package_group_guidelines"
 License:        GPL-2.0+
 Group:          Development/Libraries
 Url:            http://forge.scilab.org/index.php/p/jlatexmath/
 Source0:        http://forge.scilab.org/index.php/p/jlatexmath/downloads/get/%{name}-src-all-%{version}.zip
 Source1:        patched_fop.properties
+Patch0:         jlatexmath-1.0.3-nosource.patch
 BuildRequires:  ant
+BuildRequires:  fdupes
 BuildRequires:  java-devel
 BuildRequires:  javapackages-tools
 BuildRequires:  unzip
 BuildRequires:  xmlgraphics-fop
 Requires:       java
 Requires:       javapackages-tools
-BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 BuildArch:      noarch
 
 %description
@@ -43,6 +45,7 @@ JLaTeXMath is a fork of the excellent project JMathTeX.
 
 %package fop
 Summary:        FOP plug-in for %{name}
+# FIXME: use correct group, see "https://en.opensuse.org/openSUSE:Package_group_guidelines"
 Group:          Development/Libraries
 Requires:       %{name} = %{version}-%{release}
 Requires:       javapackages-tools
@@ -53,6 +56,7 @@ This package contains the FOP plug-in for %{name}.
 
 %package javadoc
 Summary:        API Documentation for %{name}
+# FIXME: use correct group, see "https://en.opensuse.org/openSUSE:Package_group_guidelines"
 Group:          Documentation
 Requires:       %{name} = %{version}-%{release}
 
@@ -61,6 +65,7 @@ This package contains the API documentation for %{name}.
 
 %prep
 %setup -q
+%patch0 -p1
 
 rm fop.properties
 cp -a %{SOURCE1} fop.properties
@@ -72,9 +77,7 @@ find -name '*.jar' -exec rm -f '{}' \;
 sed -i '/class-path/I d' plugin/fop/MANIFEST.MF
 
 %build
-ant buildJar
-ant fop
-ant doc
+ant -Djava_version=1.6 buildJar fop doc
 
 %install
 
@@ -84,22 +87,20 @@ cp -p dist/%{name}-fop-%{version}.jar %{buildroot}%{_javadir}/%{name}-fop.jar
 
 mkdir -p %{buildroot}%{_javadocdir}/%{name}
 cp -rp doc/ %{buildroot}%{_javadocdir}/%{name}
+%fdupes -s %{buildroot}%{_javadocdir}/%{name}
 
 %files
-%defattr(-,root,root)
 %{_javadir}/%{name}.jar
 %doc README
 %doc COPYING
 %doc LICENSE
 
 %files fop
-%defattr(-,root,root)
 %{_javadir}/%{name}-fop.jar
 %doc plugin/fop/COPYING
 %doc plugin/fop/LICENSE
 
 %files javadoc
-%defattr(-,root,root)
 %{_javadocdir}/%{name}
 
 %changelog