diff --git a/src/OpenFOAM/meshes/primitiveShapes/plane/plane.C b/src/OpenFOAM/meshes/primitiveShapes/plane/plane.C
index c191f44c3e..410b20b387 100644
--- a/src/OpenFOAM/meshes/primitiveShapes/plane/plane.C
+++ b/src/OpenFOAM/meshes/primitiveShapes/plane/plane.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2011-2012 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2011-2013 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -439,6 +439,14 @@ Foam::point Foam::plane::planePlaneIntersect
 }
 
 
+Foam::plane::side Foam::plane::sideOfPlane(const point& p) const
+{
+    const scalar angle((p - basePoint_) & unitVector_);
+
+    return (angle < 0 ? FLIP : NORMAL);
+}
+
+
 void Foam::plane::writeDict(Ostream& os) const
 {
     os.writeKeyword("planeType") << "pointAndNormal"