diff --git a/applications/solvers/lagrangian/reactingParcelFoam/YEqn.H b/applications/solvers/lagrangian/reactingParcelFoam/YEqn.H
index eb24899013..c7f9dbce34 100644
--- a/applications/solvers/lagrangian/reactingParcelFoam/YEqn.H
+++ b/applications/solvers/lagrangian/reactingParcelFoam/YEqn.H
@@ -25,7 +25,7 @@ tmp<fv::convectionScheme<scalar>> mvConvection
             (
                 fvm::ddt(rho, Yi)
               + mvConvection->fvmDiv(phi, Yi)
-              - fvm::laplacian(turbulence->alphaEff(), Yi)
+              - fvm::laplacian(turbulence->muEff(), Yi)
               ==
                 parcels.SYi(i, Yi)
               + fvOptions(rho, Yi)