diff --git a/u07-2/SimpleExecutorCompletionService_with_take.java b/u07-2/SimpleExecutorCompletionService_with_take.java
index 4486e87..c7b783e 100644
--- a/u07-2/SimpleExecutorCompletionService_with_take.java
+++ b/u07-2/SimpleExecutorCompletionService_with_take.java
@@ -64,16 +64,16 @@ public class SimpleExecutorCompletionService_with_take<ResultType> {
 
 	synchronized private void updateFuturesLists() {
 
-		for (int i = 0; i < this.pendingFutures.size(); i++) {
-			Future<ResultType> f = this.pendingFutures.get(i);
+		// for (int i = 0; i < this.pendingFutures.size(); i++) {
+		for (Future<ResultType> f : this.pendingFutures) {
+			// Future<ResultType> f = this.pendingFutures.get(i);
 
-			// for (Future<ResultType> f : this.pendingFutures) {
 			// causes concurrent access exception - why?
 
 			if (f.isDone()) {
 				this.pendingFutures.remove(f);
 				this.doneFutures.add(f);
-				notify();
+				//notify();
 			}
 		}