diff --git a/python/examples/example_jax_petab/ExampleJaxPEtab.ipynb b/python/examples/example_jax_petab/ExampleJaxPEtab.ipynb
index a937f76d47..7f541ea7e4 100644
--- a/python/examples/example_jax_petab/ExampleJaxPEtab.ipynb
+++ b/python/examples/example_jax_petab/ExampleJaxPEtab.ipynb
@@ -375,6 +375,7 @@
     "        ts_posteq=ts_posteq,\n",
     "        my=jnp.array(my),\n",
     "        iys=jnp.array(iys),\n",
+    "        x_preeq=jnp.array([]),\n",
     "        solver=diffrax.Kvaerno5(),\n",
     "        controller=diffrax.PIDController(atol=1e-8, rtol=1e-8),\n",
     "        max_steps=2**10,\n",