diff --git a/src/thermophysicalModels/solidThermo/solidThermo/solidThermo.H b/src/thermophysicalModels/solidThermo/solidThermo/solidThermo.H
index cdae056126..a2a5731162 100644
--- a/src/thermophysicalModels/solidThermo/solidThermo/solidThermo.H
+++ b/src/thermophysicalModels/solidThermo/solidThermo/solidThermo.H
@@ -139,7 +139,7 @@ public:
             virtual tmp<volScalarField> rho() const;
 
             //- Density for patch [kg/m^3]
-            virtual tmp<scalarField> rho(const label patchi) const = 0;
+            virtual tmp<scalarField> rho(const label patchi) const;
 
             //- Return non-const access to the local density field [kg/m^3]
             virtual volScalarField& rho();