diff --git a/src/main/org/apache/tools/ant/taskdefs/Parallel.java b/src/main/org/apache/tools/ant/taskdefs/Parallel.java
index 1721dfb49..7d8b310a3 100644
--- a/src/main/org/apache/tools/ant/taskdefs/Parallel.java
+++ b/src/main/org/apache/tools/ant/taskdefs/Parallel.java
@@ -265,6 +265,14 @@ public class Parallel extends Task
             daemons = new TaskRunnable[daemonTasks.tasks.size()];
         }
 
+        synchronized (semaphore) {
+            // When we leave this block we can be sure all data is really 
+            // stored in main memory before the new threads start, the new 
+            // threads will for sure load the data from main memory.
+            //
+            // This probably is slightly paranoid.
+        }
+        
         synchronized (semaphore) {
             // start any daemon threads
             if (daemons != null) {