diff --git a/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/util/ExternalEditorInput.java b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/util/ExternalEditorInput.java
index 7a2564a4c13..c3bfdd6579c 100644
--- a/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/util/ExternalEditorInput.java
+++ b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/util/ExternalEditorInput.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2000, 2008 QNX Software Systems and others.
+ * Copyright (c) 2000, 2009 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
@@ -106,6 +106,18 @@ public final class ExternalEditorInput extends FileStoreEditorInput implements I
 		return unit;
 	}
 
+	/*
+	 * @see org.eclipse.ui.ide.FileStoreEditorInput#getAdapter(java.lang.Class)
+	 */
+	@SuppressWarnings("unchecked")
+	@Override
+	public Object getAdapter(Class adapter) {
+		if (adapter.isAssignableFrom(ITranslationUnit.class) && unit != null) {
+			return unit;
+		}
+		return super.getAdapter(adapter);
+	}
+
 	/**
 	 * Return the resource where markers for this external editor input are stored
 	 */