diff --git a/src/finiteVolume/finiteVolume/fvc/fvcDdt.H b/src/finiteVolume/finiteVolume/fvc/fvcDdt.H
index 46c38bcbc9..405b4cd655 100644
--- a/src/finiteVolume/finiteVolume/fvc/fvcDdt.H
+++ b/src/finiteVolume/finiteVolume/fvc/fvcDdt.H
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2011 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2011-2013 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -39,6 +39,7 @@ SourceFiles
 #include "volFieldsFwd.H"
 #include "surfaceFieldsFwd.H"
 #include "dimensionedTypes.H"
+#include "one.H"
 #include "geometricZeroField.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //