diff --git a/src/parallel/decompose/ptscotchDecomp/ptscotchDecomp.H b/src/parallel/decompose/ptscotchDecomp/ptscotchDecomp.H
index e1c8e6c24da26cd2d9af563d2f8426b912440eb7..2436f4a2a665b3a079d6a316aa2532a7588c0b4e 100644
--- a/src/parallel/decompose/ptscotchDecomp/ptscotchDecomp.H
+++ b/src/parallel/decompose/ptscotchDecomp/ptscotchDecomp.H
@@ -111,7 +111,7 @@ public:
         }
 
         //- Return for every coordinate the wanted processor number. Use the
-        //  mesh connectivity (if needed)
+        //  mesh connectivity (if needed). See note on weights in scotchDecomp.H
         virtual labelList decompose
         (
             const polyMesh& mesh,
@@ -122,7 +122,7 @@ public:
         //- Return for every coordinate the wanted processor number. Gets
         //  passed agglomeration map (from fine to coarse cells) and coarse cell
         //  location. Can be overridden by decomposers that provide this
-        //  functionality natively.
+        //  functionality natively. See note on weights in scotchDecomp.H
         virtual labelList decompose
         (
             const polyMesh& mesh,
@@ -138,6 +138,7 @@ public:
         //    from 0 at processor0 and then incrementing all through the
         //    processors)
         //  - the connections are across coupled patches
+        //  See note on weights in scotchDecomp.H
         virtual labelList decompose
         (
             const labelListList& globalCellCells,
diff --git a/src/parallel/decompose/scotchDecomp/scotchDecomp.H b/src/parallel/decompose/scotchDecomp/scotchDecomp.H
index a4348a7641337fcc7aa945fbff7f6e7518e4829d..e3a6e673946dab2ce99813ecfc78ecaabd05e74c 100644
--- a/src/parallel/decompose/scotchDecomp/scotchDecomp.H
+++ b/src/parallel/decompose/scotchDecomp/scotchDecomp.H
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2009-2010 OpenCFD Ltd.
+    \\  /    A nd           | Copyright (C) 2009-2011 OpenCFD Ltd.
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -107,9 +107,9 @@ public:
 
         //- Return for every coordinate the wanted processor number. Use the
         //  mesh connectivity (if needed)
-        //  Weights get truncated to convert into integer
-        //  so e.g. 3.5 is seen as 3. The overall sum of weights
-        //  might otherwise overflow.
+        //  Weights get normalised with minimum weight and truncated to
+        //  convert into integer so e.g. 3.5 is seen as 3. The overall sum
+        //  of weights might otherwise overflow.
         virtual labelList decompose
         (
             const polyMesh& mesh,