--- jsr166/src/jsr166y/ForkJoinWorkerThread.java	2009/07/27 20:57:44	1.21
+++ jsr166/src/jsr166y/ForkJoinWorkerThread.java	2009/07/29 12:05:55	1.22
@@ -647,7 +647,7 @@ public class ForkJoinWorkerThread extend
      *
      * @return the number of tasks drained
      */
-    final int drainTasksTo(Collection<ForkJoinTask<?>> c) {
+    final int drainTasksTo(Collection<? super ForkJoinTask<?>> c) {
         int n = 0;
         ForkJoinTask<?> t;
         while (base != sp && (t = deqTask()) != null) {