diff --git a/python/osd/subdivider.cpp b/python/osd/subdivider.cpp
index a172cbfc..ef17a6a8 100644
--- a/python/osd/subdivider.cpp
+++ b/python/osd/subdivider.cpp
@@ -109,14 +109,14 @@ shim::Subdivider::setCoarseVertices(const HeterogeneousBuffer& cage)
 {
     float* pFloats = (float*) &cage.Buffer[0];
     int numFloats = cage.Buffer.size() / sizeof(float);
-    self->vertexBuffer->UpdateData(pFloats, numFloats);
+    self->vertexBuffer->UpdateData(pFloats, /*start vertex*/ 0, numFloats);
 }
 
 void
 shim::Subdivider::refine()
 {
     g_osdComputeController->Refine(self->computeContext,
-                                   self->farmesh->GetKernelBatches(),
+                                   self->farMesh->GetKernelBatches(),
                                    self->vertexBuffer);
 }