diff --git a/include/vsg/app/CommandGraph.h b/include/vsg/app/CommandGraph.h
index 7de5e1eeb..3e94cd652 100644
--- a/include/vsg/app/CommandGraph.h
+++ b/include/vsg/app/CommandGraph.h
@@ -26,6 +26,7 @@ namespace vsg
     class VSG_DECLSPEC CommandGraph : public Inherit<Group, CommandGraph>
     {
     public:
+        CommandGraph();
         CommandGraph(ref_ptr<Device> in_device, int family);
         explicit CommandGraph(ref_ptr<Window> in_window, ref_ptr<Node> child = {});
 
diff --git a/src/vsg/app/CommandGraph.cpp b/src/vsg/app/CommandGraph.cpp
index 34ac78316..ab45b646c 100644
--- a/src/vsg/app/CommandGraph.cpp
+++ b/src/vsg/app/CommandGraph.cpp
@@ -18,6 +18,10 @@ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLI
 
 using namespace vsg;
 
+CommandGraph::CommandGraph()
+{
+}
+
 CommandGraph::CommandGraph(ref_ptr<Device> in_device, int family) :
     device(in_device),
     queueFamily(family),