diff --git a/plugins/org.eclipse.dd.dsf/org.eclipse.dd.dsf.cspec b/plugins/org.eclipse.dd.dsf/org.eclipse.dd.dsf.cspex
similarity index 89%
rename from plugins/org.eclipse.dd.dsf/org.eclipse.dd.dsf.cspec
rename to plugins/org.eclipse.dd.dsf/org.eclipse.dd.dsf.cspex
index f9cd278ceb5..8402605eb63 100644
--- a/plugins/org.eclipse.dd.dsf/org.eclipse.dd.dsf.cspec
+++ b/plugins/org.eclipse.dd.dsf/org.eclipse.dd.dsf.cspex
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<cs:cspec xmlns:cs="http://www.eclipse.org/buckminster/CSpec-1.0" name="org.eclipse.dd.dsf">
+<cs:cspecExtension xmlns:cs="http://www.eclipse.org/buckminster/CSpec-1.0" name="org.eclipse.dd.dsf">
     <cs:artifacts>
     	<cs:public name="source" path="src/"/>
     </cs:artifacts>
@@ -29,4 +29,4 @@
     		<cs:local attribute="eclipse.build"/>
     	</cs:public>
     </cs:groups>
-</cs:cspec>
+</cs:cspecExtension>