diff --git a/src/OpenFOAM/meshes/polyMesh/polyPatches/basic/generic/genericPolyPatch.H b/src/OpenFOAM/meshes/polyMesh/polyPatches/basic/generic/genericPolyPatch.H
index ae8f7cbedb..2ac9cba937 100644
--- a/src/OpenFOAM/meshes/polyMesh/polyPatches/basic/generic/genericPolyPatch.H
+++ b/src/OpenFOAM/meshes/polyMesh/polyPatches/basic/generic/genericPolyPatch.H
@@ -26,8 +26,8 @@ Class
     Foam::genericPolyPatch
 
 Description
-    Determines a mapping between patch face centres and mesh cell centres and
-    processors they're on.
+    Substitute for unknown patches. Used for postprocessing when only
+    basic polyPatch info is needed.
 
 Note
     Storage is not optimal. It stores all face centres and cells on all