diff --git a/doc/supply_demand.rst b/doc/supply_demand.rst
index d7ce274a..fccbc3b7 100644
--- a/doc/supply_demand.rst
+++ b/doc/supply_demand.rst
@@ -405,3 +405,5 @@ plants, and directly from the air (DAC).
 
 Carbon dioxide can be used as an input for methanation and
 Fischer-Tropsch fuels, or it can be sequestered underground.
+
+[Heat demand](#heat-demand)