diff --git a/src/turbulenceModels/incompressible/LES/SpalartAllmaras/SpalartAllmaras.C b/src/turbulenceModels/incompressible/LES/SpalartAllmaras/SpalartAllmaras.C
index c440294bad..0932bb524e 100644
--- a/src/turbulenceModels/incompressible/LES/SpalartAllmaras/SpalartAllmaras.C
+++ b/src/turbulenceModels/incompressible/LES/SpalartAllmaras/SpalartAllmaras.C
@@ -155,13 +155,13 @@ SpalartAllmaras::SpalartAllmaras
 :
     LESModel(modelName, U, phi, transport),
 
-    alphaNut_
+    sigmaNut_
     (
         dimensioned<scalar>::lookupOrAddToDict
         (
-            "alphaNut",
+            "sigmaNut",
             coeffDict_,
-            1.5
+            0.66666
         )
     ),
     kappa_
@@ -169,7 +169,7 @@ SpalartAllmaras::SpalartAllmaras
         dimensioned<scalar>::lookupOrAddToDict
         (
             "kappa",
-            *this,
+            coeffDict_,
             0.41
         )
     ),
@@ -227,7 +227,7 @@ SpalartAllmaras::SpalartAllmaras
             0.07
         )
     ),
-    Cw1_(Cb1_/sqr(kappa_) + alphaNut_*(1.0 + Cb2_)),
+    Cw1_(Cb1_/sqr(kappa_) + (1.0 + Cb2_)/sigmaNut_),
     Cw2_
     (
         dimensioned<scalar>::lookupOrAddToDict
@@ -301,11 +301,11 @@ void SpalartAllmaras::correct(const tmp<volTensorField>& gradU)
       + fvm::div(phi(), nuTilda_)
       - fvm::laplacian
         (
-            alphaNut_*(nuTilda_ + nu()),
+            (nuTilda_ + nu())/sigmaNut_,
             nuTilda_,
             "laplacian(DnuTildaEff,nuTilda)"
         )
-      - alphaNut_*Cb2_*magSqr(fvc::grad(nuTilda_))
+      - Cb2_/sigmaNut_*magSqr(fvc::grad(nuTilda_))
      ==
         Cb1_*STilda*nuTilda_
       - fvm::Sp(Cw1_*fw(STilda, dTilda)*nuTilda_/sqr(dTilda), nuTilda_)
@@ -358,7 +358,7 @@ bool SpalartAllmaras::read()
 {
     if (LESModel::read())
     {
-        alphaNut_.readIfPresent(coeffDict());
+        sigmaNut_.readIfPresent(coeffDict());
         kappa_.readIfPresent(*this);
         Cb1_.readIfPresent(coeffDict());
         Cb2_.readIfPresent(coeffDict());
@@ -366,7 +366,7 @@ bool SpalartAllmaras::read()
         Cv2_.readIfPresent(coeffDict());
         CDES_.readIfPresent(coeffDict());
         ck_.readIfPresent(coeffDict());
-        Cw1_ = Cb1_/sqr(kappa_) + alphaNut_*(1.0 + Cb2_);
+        Cw1_ = Cb1_/sqr(kappa_) + (1.0 + Cb2_)/sigmaNut_;
         Cw2_.readIfPresent(coeffDict());
         Cw3_.readIfPresent(coeffDict());
 
diff --git a/src/turbulenceModels/incompressible/LES/SpalartAllmaras/SpalartAllmaras.H b/src/turbulenceModels/incompressible/LES/SpalartAllmaras/SpalartAllmaras.H
index a1f951ac92..03058f5b68 100644
--- a/src/turbulenceModels/incompressible/LES/SpalartAllmaras/SpalartAllmaras.H
+++ b/src/turbulenceModels/incompressible/LES/SpalartAllmaras/SpalartAllmaras.H
@@ -71,7 +71,7 @@ protected:
 
     // Protected data
 
-        dimensionedScalar alphaNut_;
+        dimensionedScalar sigmaNut_;
         dimensionedScalar kappa_;