diff --git a/applications/solvers/multiphase/twoLiquidMixingFoam/alphaEqn.H b/applications/solvers/multiphase/twoLiquidMixingFoam/alphaEqn.H
index c126025368..c27a3e752e 100644
--- a/applications/solvers/multiphase/twoLiquidMixingFoam/alphaEqn.H
+++ b/applications/solvers/multiphase/twoLiquidMixingFoam/alphaEqn.H
@@ -3,7 +3,7 @@
     (
         fvm::ddt(alpha1)
       + fvm::div(phi, alpha1)
-      - fvm::laplacian(Dab, alpha1)
+      - fvm::laplacian(turbulence->nut() + Dab, alpha1)
     );
 
     alpha1Eqn.solve();