Index: antlr-2.7.6/build.xml
===================================================================
--- antlr-2.7.6.orig/build.xml
+++ antlr-2.7.6/build.xml
@@ -36,6 +36,7 @@
   <!-- Build classes -->
   <target name="classes" depends="prepare">
     <javac srcdir="${src}" destdir="${build.classes}"
+      source="1.4" target="1.4"
       debug="off" optimize="on" deprecation="on"/>
   </target>
 
@@ -52,6 +53,7 @@
   <!-- Build the full JavaDocs -->
   <target name="javadoc" depends="prepare">
     <javadoc sourcepath="${src}"
+      source="1.4"
       destdir="${build.doc}"
       doctitle="${name} Javadoc"
       windowtitle="${name} Javadoc"