diff --git a/doc/tutorial.rst b/doc/tutorial.rst
index 2b16fb57b88db0bc741f0fc2d2cd11e87dbbdc3a..5ed4567054bb217103b3b4bd60b78994eaa8b96f 100644
--- a/doc/tutorial.rst
+++ b/doc/tutorial.rst
@@ -474,6 +474,7 @@ ambiguous.
 
 .. doctest::
 
+    >>> knl = lp.set_options(knl, "write_cl")
     >>> evt, (out,) = knl(queue, a=a_mat_dev)
     #define lid(N) ((int) get_local_id(N))
     ...