diff --git a/src/regionModels/surfaceFilmModels/thermoSingleLayer/thermoSingleLayer.C b/src/regionModels/surfaceFilmModels/thermoSingleLayer/thermoSingleLayer.C
index 8fafa3529e..ffa2036609 100644
--- a/src/regionModels/surfaceFilmModels/thermoSingleLayer/thermoSingleLayer.C
+++ b/src/regionModels/surfaceFilmModels/thermoSingleLayer/thermoSingleLayer.C
@@ -555,7 +555,7 @@ thermoSingleLayer::thermoSingleLayer
         phi_ = fvc::interpolate(deltaRho_*U_) & regionMesh().Sf();
 
         // evaluate viscosity from user-model
-//        viscosity_->correct(pPrimary_, T_);
+        viscosity_->correct(pPrimary_, T_);
     }
 }