diff --git a/src/thermophysicalModels/reactionThermo/psiReactionThermo/psiReactionThermo.H b/src/thermophysicalModels/reactionThermo/psiReactionThermo/psiReactionThermo.H
index 79af4285..1d94a8c5 100644
--- a/src/thermophysicalModels/reactionThermo/psiReactionThermo/psiReactionThermo.H
+++ b/src/thermophysicalModels/reactionThermo/psiReactionThermo/psiReactionThermo.H
@@ -102,6 +102,13 @@ public:
 
         //- Return the composition of the multi-component mixture
         virtual const basicMultiComponentMixture& composition() const = 0;
+
+        // Access to electric state variables
+
+            //- Thermal diffusivity for enthalpy of mixture [kg/m/s]
+            virtual volScalarField& qc() = 0;
+            virtual const volScalarField& qc() const = 0;
+
 };