diff --git a/panda/src/display/graphicsStateGuardian.cxx b/panda/src/display/graphicsStateGuardian.cxx
index c6b0762b9d..209f8b32c1 100644
--- a/panda/src/display/graphicsStateGuardian.cxx
+++ b/panda/src/display/graphicsStateGuardian.cxx
@@ -72,7 +72,7 @@ GraphicsStateGuardian(GraphicsWindow *win) {
 
 ////////////////////////////////////////////////////////////////////
 //     Function: GraphicsStateGuardian::Destructor
-//       Access: Public
+//       Access: Public, Virtual
 //  Description: 
 ////////////////////////////////////////////////////////////////////
 GraphicsStateGuardian::
diff --git a/panda/src/display/graphicsStateGuardian.h b/panda/src/display/graphicsStateGuardian.h
index 5ac87eb0dd..5afec2ca2d 100644
--- a/panda/src/display/graphicsStateGuardian.h
+++ b/panda/src/display/graphicsStateGuardian.h
@@ -41,7 +41,7 @@ class EXPCL_PANDA GraphicsStateGuardian : public GraphicsStateGuardianBase {
   //
 public:
   GraphicsStateGuardian(GraphicsWindow *win);
-  ~GraphicsStateGuardian();
+  virtual ~GraphicsStateGuardian();
 
 PUBLISHED:
   INLINE void set_render_traverser(RenderTraverser *rt);