diff --git a/src/framework/graphics/graphicscontextresource.cpp b/src/framework/graphics/graphicscontextresource.cpp
index 1f56b0c..7cec9af 100644
--- a/src/framework/graphics/graphicscontextresource.cpp
+++ b/src/framework/graphics/graphicscontextresource.cpp
@@ -21,12 +21,20 @@ void GraphicsContextResource::Release()
 BOOL GraphicsContextResource::Initialize()
 {
 	STACK_TRACE;
+	ASSERT(m_graphicsDevice == NULL);
+	if (m_graphicsDevice != NULL)
+		return FALSE;
+	
 	return TRUE;
 }
 
 BOOL GraphicsContextResource::Initialize(GraphicsDevice *graphicsDevice)
 {
 	STACK_TRACE;
+	ASSERT(m_graphicsDevice == NULL);
+	if (m_graphicsDevice != NULL)
+		return FALSE;
+	
 	ASSERT(graphicsDevice != NULL);
 	if (graphicsDevice == NULL)
 		return FALSE;