diff --git a/flowRateTiltedInletVelocityFvPatchVectorField.C b/flowRateTiltedInletVelocityFvPatchVectorField.C
index 3ecb5e8..6f52306 100644
--- a/flowRateTiltedInletVelocityFvPatchVectorField.C
+++ b/flowRateTiltedInletVelocityFvPatchVectorField.C
@@ -173,7 +173,7 @@ void Foam::flowRateTiltedInletVelocityFvPatchVectorField::updateCoeffs()
     // a simpler way of doing this would be nice
     const scalar avgU = -flowRate_->value(t)/gSum(patch().magSf());
 
-    tmp<vectorField> n = patch().nf();
+    vectorField n(patch().nf());
 
     scalarField B(Foam::asin(n & axis_));