diff --git a/js/rhino/build.properties b/js/rhino/build.properties
index 7592d81ba85..cf790842568 100644
--- a/js/rhino/build.properties
+++ b/js/rhino/build.properties
@@ -49,6 +49,7 @@ classes: ${build.dir}/classes
 # compilation settings
 debug: on
 target-jvm: 1.1
+source-level: 1.3
 
 # jar generation settings 
 jar-compression: true
diff --git a/js/rhino/deprecatedsrc/build.xml b/js/rhino/deprecatedsrc/build.xml
index 284ff5bbe6e..71ad7175563 100644
--- a/js/rhino/deprecatedsrc/build.xml
+++ b/js/rhino/deprecatedsrc/build.xml
@@ -11,6 +11,7 @@
            deprecation="on"
            debug="${debug}"
 	   target="${target-jvm}"
+ 	   source="${source-level}"
 	   >
     </javac>
   </target>
diff --git a/js/rhino/src/build.xml b/js/rhino/src/build.xml
index 7e5ae6fa753..4d848fd7f21 100644
--- a/js/rhino/src/build.xml
+++ b/js/rhino/src/build.xml
@@ -15,6 +15,7 @@ Requires Ant version 1.2
            deprecation="on"
            debug="${debug}"
 	   target="${target-jvm}"
+	   source="${source-level}"
 	   >
     </javac>
     <copy todir="${classes}">
diff --git a/js/rhino/toolsrc/build.xml b/js/rhino/toolsrc/build.xml
index 2900d95c97b..fab21adb2fb 100644
--- a/js/rhino/toolsrc/build.xml
+++ b/js/rhino/toolsrc/build.xml
@@ -19,7 +19,9 @@ Requires Ant version 1.2
            includes="org/**/*.java"
            deprecation="on"
            debug="${debug}"
-	   target="${target-jvm}">
+	   target="${target-jvm}"
+ 	   source="${source-level}"
+	   >
     </javac>
     <copy todir="${classes}">
       <fileset dir="toolsrc" includes="org/**/*.properties" />