diff --git a/src/helma/framework/core/RequestEvaluator.java b/src/helma/framework/core/RequestEvaluator.java
index 35e26f3b..362d2f5f 100644
--- a/src/helma/framework/core/RequestEvaluator.java
+++ b/src/helma/framework/core/RequestEvaluator.java
@@ -38,8 +38,8 @@ public final class RequestEvaluator implements Runnable {
     static final int EXTERNAL = 4; // function from script etc
     public final Application app;
     protected ScriptingEngine scriptingEngine;
-    public RequestTrans req;
-    public ResponseTrans res;
+    public volatile RequestTrans req;
+    public volatile ResponseTrans res;
 
     // the one and only transactor thread
     volatile Transactor rtx;