diff --git a/panda/src/glstuff/glmisc_src.cxx b/panda/src/glstuff/glmisc_src.cxx
index 084784142e..807d4a1f7f 100644
--- a/panda/src/glstuff/glmisc_src.cxx
+++ b/panda/src/glstuff/glmisc_src.cxx
@@ -88,7 +88,7 @@ void CLP(init_classes)() {
   CLP(ShaderContext)::init_type();
   CLP(TextureContext)::init_type();
   CLP(VertexBufferContext)::init_type();
-
+  CLP(GraphicsBuffer)::init_type();
   PandaSystem *ps = PandaSystem::get_global_ptr();
   ps->add_system(GLSYSTEM_NAME);