diff --git a/doc/limitations.rst b/doc/limitations.rst
index 9f02d763..f54813e6 100644
--- a/doc/limitations.rst
+++ b/doc/limitations.rst
@@ -35,6 +35,10 @@ See also the `GitHub repository issues <https://github.com/PyPSA/pypsa-eur-sec/i
   To avoid penny-switching the transformation of transport and
   industry away from fossil fuels is determined exogenously.
 
+- **Industry materials production constant and inelastic:**
+  For industry, the production of different materials per country is 
+  assumed to remain constant and no industry demand elasticity is included in the modelled.
+
 - **Energy demand distribution within countries:**
   Assumptions
   have been made about the distribution of demand in each country proportional to