diff -Naur ../libreadline-java-0.8.0.orig/Makefile ./Makefile
--- ../libreadline-java-0.8.0.orig/Makefile	2003-01-07 11:14:35.000000000 +0100
+++ ./Makefile	2006-09-26 14:04:36.000000000 +0200
@@ -70,7 +70,7 @@
 
 ## normal javac
 JAVAC = javac
-JC_FLAGS = 
+JC_FLAGS = -source 1.4 -target 1.4
 
 ## with jikes
 #JAVAC = jikes