diff --git a/src/turbulenceModels/incompressible/RAS/derivedFvPatchFields/atmBoundaryLayerInletVelocity/atmBoundaryLayerInletVelocityFvPatchVectorField.H b/src/turbulenceModels/incompressible/RAS/derivedFvPatchFields/atmBoundaryLayerInletVelocity/atmBoundaryLayerInletVelocityFvPatchVectorField.H
index 1cfd6616c73f79942318a4c74907c00363728bbd..684405ece39d259079c0200ef5fe88e960e41c90 100644
--- a/src/turbulenceModels/incompressible/RAS/derivedFvPatchFields/atmBoundaryLayerInletVelocity/atmBoundaryLayerInletVelocityFvPatchVectorField.H
+++ b/src/turbulenceModels/incompressible/RAS/derivedFvPatchFields/atmBoundaryLayerInletVelocity/atmBoundaryLayerInletVelocityFvPatchVectorField.H
@@ -181,7 +181,7 @@ public:
     // Member functions
 
         //- Return Ustar
-        scalar& Ustar()
+        scalarField& Ustar()
         {
             return Ustar_;
         }