diff --git a/bundles/org.eclipse.core.commands/src/org/eclipse/core/commands/common/EventManager.java b/bundles/org.eclipse.core.commands/src/org/eclipse/core/commands/common/EventManager.java
index c52bda6..c1247e2 100644
--- a/bundles/org.eclipse.core.commands/src/org/eclipse/core/commands/common/EventManager.java
+++ b/bundles/org.eclipse.core.commands/src/org/eclipse/core/commands/common/EventManager.java
@@ -41,7 +41,7 @@
 	 * A collection of objects listening to changes to this manager. This
 	 * collection is <code>null</code> if there are no listeners.
 	 */
-	private volatile ListenerList<Object> listenerList = null;
+	private volatile transient ListenerList<Object> listenerList = null;
 
 	/**
 	 * Adds a listener to this manager that will be notified when this manager's