diff --git a/examples/sediment_deposit/sediment_deposit.py b/examples/sediment_deposit/sediment_deposit.py
index df156825c314980dd47a01b096fb90e60ce5572d..a2d47fbcd294b9732b74ef9df96d1be04b2ab619 100644
--- a/examples/sediment_deposit/sediment_deposit.py
+++ b/examples/sediment_deposit/sediment_deposit.py
@@ -280,8 +280,8 @@ def compute(args):
     dump_fields = HDF_Writer(name='dump',
                              io_params=io_params,
                              force_backend=Backend.OPENCL,
-                             variables={velo: npts, 
-                                        vorti: npts,
+                             variables={#velo: npts, 
+                                        #vorti: npts,
                                         S: npts},
                              **extra_op_kwds)