diff --git a/src/finiteVolume/fields/fvPatchFields/derived/freestreamPressure/freestreamPressureFvPatchScalarField.C b/src/finiteVolume/fields/fvPatchFields/derived/freestreamPressure/freestreamPressureFvPatchScalarField.C
index ccb1ea4c9..855365b6e 100644
--- a/src/finiteVolume/fields/fvPatchFields/derived/freestreamPressure/freestreamPressureFvPatchScalarField.C
+++ b/src/finiteVolume/fields/fvPatchFields/derived/freestreamPressure/freestreamPressureFvPatchScalarField.C
@@ -131,7 +131,7 @@ void Foam::freestreamPressureFvPatchScalarField::updateCoeffs()
             UName_
         );
 
-    const Field<scalar> magUp = mag(Up);
+    const Field<scalar> magUp(mag(Up));
 
     const Field<vector>& nf = patch().nf();
 
diff --git a/src/finiteVolume/fields/fvPatchFields/derived/freestreamVelocity/freestreamVelocityFvPatchVectorField.C b/src/finiteVolume/fields/fvPatchFields/derived/freestreamVelocity/freestreamVelocityFvPatchVectorField.C
index 74f4917a5..d6c575c7b 100644
--- a/src/finiteVolume/fields/fvPatchFields/derived/freestreamVelocity/freestreamVelocityFvPatchVectorField.C
+++ b/src/finiteVolume/fields/fvPatchFields/derived/freestreamVelocity/freestreamVelocityFvPatchVectorField.C
@@ -107,7 +107,7 @@ void Foam::freestreamVelocityFvPatchVectorField::updateCoeffs()
     }
 
     const Field<vector>& Up = *this;
-    const Field<scalar> magUp = mag(Up);
+    const Field<scalar> magUp(mag(Up));
 
     const Field<vector>& nf = patch().nf();