diff --git a/src/nvimage/DirectDrawSurface.cpp b/src/nvimage/DirectDrawSurface.cpp
index fd4de27..542ca8d 100644
--- a/src/nvimage/DirectDrawSurface.cpp
+++ b/src/nvimage/DirectDrawSurface.cpp
@@ -778,6 +778,15 @@ DirectDrawSurface::DirectDrawSurface(const char * name) : stream(new StdInputStr
 	}
 }
 
+DirectDrawSurface::DirectDrawSurface(Stream * s) : stream(s)
+{
+	if (!stream->isError())
+	{
+		(*stream) << header;
+	}
+}
+
+
 DirectDrawSurface::~DirectDrawSurface()
 {
 	delete stream;
diff --git a/src/nvimage/DirectDrawSurface.h b/src/nvimage/DirectDrawSurface.h
index 918a6f9..9f1ffd7 100644
--- a/src/nvimage/DirectDrawSurface.h
+++ b/src/nvimage/DirectDrawSurface.h
@@ -112,6 +112,7 @@ namespace nv
 	{
 	public:
 		DirectDrawSurface(const char * file);
+		DirectDrawSurface(Stream * stream);
 		~DirectDrawSurface();
 		
 		bool isValid() const;