diff --git a/org.springframework.integration/src/test/java/org/springframework/integration/executor/StubErrorHandler.java b/org.springframework.integration/src/test/java/org/springframework/integration/executor/StubErrorHandler.java
index c20ac457f6..3edcb13468 100644
--- a/org.springframework.integration/src/test/java/org/springframework/integration/executor/StubErrorHandler.java
+++ b/org.springframework.integration/src/test/java/org/springframework/integration/executor/StubErrorHandler.java
@@ -22,7 +22,7 @@ import org.springframework.integration.util.ErrorHandler;
 
 public class StubErrorHandler implements ErrorHandler {
 
-	List<Throwable> throwables = new ArrayList<Throwable>();
+	volatile List<Throwable> throwables = new ArrayList<Throwable>();
 	
 	public void handle(Throwable t) {
 		throwables.add(t);