diff --git a/notebooks/time_Ar0n.py b/notebooks/time_Ar0n.py
index 661a09dad9af1e0e65b924952912a9277c879c34..d16f6f68c34262fe6fa62c66de968e28a343aa0d 100644
--- a/notebooks/time_Ar0n.py
+++ b/notebooks/time_Ar0n.py
@@ -21,7 +21,7 @@ def build_models():
         teqp.PCSAFTEOS(['Methane']),
         teqp.vdWEOS([150.687], [4863000.0]),
         teqp.vdWEOS1(1, 2),
-        # mH2O,
+        mH2O,
         teqp.build_multifluid_model(["Methane"], '../mycp', '../mycp/dev/mixtures/mixture_binary_pairs.json')
     ]