diff --git a/panda/src/pgraph/sceneGraphAnalyzer.h b/panda/src/pgraph/sceneGraphAnalyzer.h
index b6a57cef79..8d88d937f5 100644
--- a/panda/src/pgraph/sceneGraphAnalyzer.h
+++ b/panda/src/pgraph/sceneGraphAnalyzer.h
@@ -29,6 +29,7 @@ class PandaNode;
 class GeomNode;
 class Geom;
 class GeomVertexData;
+class GeomVertexArrayData;
 class Texture;
 
 ////////////////////////////////////////////////////////////////////