--- a/jdk/src/share/classes/sun/tools/jstat/Scale.java	Wed Jun 11 15:47:53 2014 +0200
+++ b/jdk/src/share/classes/sun/tools/jstat/Scale.java	Thu Jun 12 10:32:19 2014 +0200
@@ -175,7 +175,7 @@
      * @param   s  an string to match against Scale objects.
      * @return     The Scale object matching the given string.
      */
-    protected static Set keySet() {
+    protected static Set<String> keySet() {
         return map.keySet();
     }