diff --git a/doc/supply_demand.rst b/doc/supply_demand.rst
index e43b69c5..ec316959 100644
--- a/doc/supply_demand.rst
+++ b/doc/supply_demand.rst
@@ -4,6 +4,10 @@
 Supply and demand
 ##########################################
 
+
+Test |H2O|
+
+.. |H2O| replace:: H\ :sub:`2`\ O
 An initial orientation to the supply and demand options in the model
 PyPSA-Eur-Sec can be found in the description of the model
 PyPSA-Eur-Sec-30 in the paper `Synergies of sector coupling and
@@ -614,6 +618,4 @@ Captured $CO_2$ can also be sequestered underground up to an annual sequestratio
 Carbon dioxide can be modelled as a single node for Europe (in this case, $CO_2$ transport constraints are neglected). A network for modelling the transport of $CO_2$ among the different nodes can also be created if selected in the `config file <https://github.com/PyPSA/pypsa-eur-sec/blob/3daff49c9999ba7ca7534df4e587e1d516044fc3/config.default.yaml#L248>`_. 
 
 
-Test |H2O|
 
-..|H2O| replace:: H\ :sub:`2`\ O