diff --git a/panda/src/gobj/qpgeomVertexData.cxx b/panda/src/gobj/qpgeomVertexData.cxx
index b55042827a..b001a0628f 100644
--- a/panda/src/gobj/qpgeomVertexData.cxx
+++ b/panda/src/gobj/qpgeomVertexData.cxx
@@ -502,7 +502,7 @@ copy_from(const qpGeomVertexData &source, bool keep_data_objects) {
         }
         
         clear_transform_blend_palette();
-        set_transform_palette(transform_palette);
+        set_transform_palette(TransformPalette::register_palette(transform_palette));
       }
     }
   }