--- jsr166/src/main/java/util/PriorityQueue.java	2014/04/11 21:15:44	1.99
+++ jsr166/src/main/java/util/PriorityQueue.java	2014/08/29 21:42:37	1.100
@@ -393,7 +393,7 @@ public class PriorityQueue<E> extends Ab
      * @return {@code true} if this queue contains the specified element
      */
     public boolean contains(Object o) {
-        return indexOf(o) != -1;
+        return indexOf(o) >= 0;
     }
 
     /**