diff --git a/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/cview/IncludeReferenceProxy.java b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/cview/IncludeReferenceProxy.java
index 26b8a74e04c..4cba7777a32 100644
--- a/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/cview/IncludeReferenceProxy.java
+++ b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/cview/IncludeReferenceProxy.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2000, 2006 QNX Software Systems and others.
+ * Copyright (c) 2000, 2008 QNX Software 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
@@ -76,9 +76,24 @@ public class IncludeReferenceProxy extends CElementGrouping {
 	 */
 	@Override
 	public boolean equals(Object obj) {
-		return reference.equals(obj);
+		if (this == obj) {
+			return true;
+		}
+		if (!(obj instanceof IncludeReferenceProxy)) {
+			return false;
+		}
+		IncludeReferenceProxy other = (IncludeReferenceProxy) obj;
+		return reference.equals(other.reference);
 	}
 
+	/*
+	 * @see java.lang.Object#hashCode()
+	 */
+	@Override
+	public int hashCode() {
+		return reference.hashCode();
+	}
+	
 	/* (non-Javadoc)
 	 * @see java.lang.Object#toString()
 	 */