diff --git a/dsf/org.eclipse.cdt.dsf.ui/src/org/eclipse/cdt/dsf/ui/viewmodel/datamodel/AbstractDMVMNode.java b/dsf/org.eclipse.cdt.dsf.ui/src/org/eclipse/cdt/dsf/ui/viewmodel/datamodel/AbstractDMVMNode.java
index ec6119e1ae7..9745445feae 100644
--- a/dsf/org.eclipse.cdt.dsf.ui/src/org/eclipse/cdt/dsf/ui/viewmodel/datamodel/AbstractDMVMNode.java
+++ b/dsf/org.eclipse.cdt.dsf.ui/src/org/eclipse/cdt/dsf/ui/viewmodel/datamodel/AbstractDMVMNode.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2006, 2009 Wind River Systems and others.
+ * Copyright (c) 2006, 2010 Wind River Systems and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -55,6 +55,7 @@ abstract public class AbstractDMVMNode extends AbstractVMNode implements IVMNode
         
         public DMVMContext(IDMContext dmc) {
             super(AbstractDMVMNode.this);
+            assert dmc != null;
             fDmc = dmc;
         }