diff --git a/build/build.xml b/build/build.xml
index 63876e7..7f00836 100644
--- a/build/build.xml
+++ b/build/build.xml
@@ -84,7 +84,7 @@
 	</target>
 	
 	<target name="executableGuiJar" depends="init" description="Build GUI executable JAR">
-		<javac srcdir="${source}" destdir="${classes}" target="1.5" source="1.5" classpath="${swtjar}">
+		<javac srcdir="${source}" destdir="${classes}" classpath="${swtjar}">
 			<include name="**/*.java"/>
 			<exclude name="**/*Test.java"/>
 		</javac>
@@ -104,9 +104,10 @@
 	</target>
 	
 	<target name="executableCmdJar" depends="init" description="Build command-line only executable JAR">
-		<javac srcdir="${source}" destdir="${classes}" target="1.3" source="1.3">
+		<javac srcdir="${source}" destdir="${classes}" >
 			<include name="**/*.java"/>
 			<exclude name="**/*Test.java"/>
+			<compilerarg value="-XDignore.symbol.file"/>
 		</javac>
 		<jar jarfile="${cmdjar}" manifest="build/ac.mf">
 			<fileset dir="${classes}">