diff --git a/libreadline-java-0.8.0-sourcetarget.patch b/libreadline-java-0.8.0-sourcetarget.patch
new file mode 100644
index 0000000..18ee4df
--- /dev/null
+++ b/libreadline-java-0.8.0-sourcetarget.patch
@@ -0,0 +1,11 @@
+--- libreadline-java-0.8.0/Makefile	2017-12-18 11:50:48.197823175 +0100
++++ libreadline-java-0.8.0/Makefile	2017-12-18 13:31:13.714940274 +0100
+@@ -70,7 +70,7 @@
+ 
+ ## normal javac
+ JAVAC = javac
+-JC_FLAGS = 
++JC_FLAGS = -source 1.6 -target 1.6
+ 
+ ## with jikes
+ #JAVAC = jikes
diff --git a/libreadline-java.changes b/libreadline-java.changes
index e0efb76..9feec39 100644
--- a/libreadline-java.changes
+++ b/libreadline-java.changes
@@ -5,6 +5,7 @@ Mon Dec 18 10:57:33 UTC 2017 - fstrba@suse.com
   * libreadline-java-0.8.0-jdk10.patch
     - Allow building with jdk10 that does not have javah
 - Run fdupes on documentation
+- Build with source and target level 1.6
 
 -------------------------------------------------------------------
 Mon Sep 18 12:42:17 UTC 2017 - fstrba@suse.com
diff --git a/libreadline-java.spec b/libreadline-java.spec
index c584b34..991a656 100644
--- a/libreadline-java.spec
+++ b/libreadline-java.spec
@@ -29,6 +29,7 @@ Patch0:         libreadline-java-ncurses.patch
 Patch1:         libreadline-java-libdir.patch
 Patch2:         libreadline-java-0.8.0-missing-return-type.patch
 Patch3:         libreadline-java-0.8.0-jdk10.patch
+Patch4:         libreadline-java-0.8.0-sourcetarget.patch
 BuildRequires:  fdupes
 BuildRequires:  java-devel >= 1.8
 BuildRequires:  javapackages-tools
@@ -58,6 +59,7 @@ wrapper. This package contains the javadoc documentation for it.
 %patch1
 %patch2 -p1
 %patch3 -p1
+%patch4 -p1
 find . -name "*.jar" -exec rm -f {} \;
 sed -i 's|@LIBDIR@|%{_libdir}|' src/org/gnu/readline/Readline.java