diff --git a/source/blender/blenkernel/intern/DerivedMesh.c b/source/blender/blenkernel/intern/DerivedMesh.c
index eeff04788f9..79e39d5fd45 100644
--- a/source/blender/blenkernel/intern/DerivedMesh.c
+++ b/source/blender/blenkernel/intern/DerivedMesh.c
@@ -950,6 +950,7 @@ static void mesh_calc_modifiers(struct Depsgraph *depsgraph,
   CDMaskLink *md_datamask = datamasks;
   /* XXX Always copying POLYINDEX, else tessellated data are no more valid! */
   CustomData_MeshMasks append_mask = CD_MASK_BAREMESH_ORIGINDEX;
+  append_mask.vmask |= CD_MASK_MDEFORMVERT;
 
   /* Clear errors before evaluation. */
   BKE_modifiers_clear_errors(ob);