diff --git a/src/fvMotionSolver/fvMotionSolvers/displacement/interpolation/displacementInterpolationMotionSolver.H b/src/fvMotionSolver/fvMotionSolvers/displacement/interpolation/displacementInterpolationMotionSolver.H
index b5da0b5b3b..a4fb70ef90 100644
--- a/src/fvMotionSolver/fvMotionSolvers/displacement/interpolation/displacementInterpolationMotionSolver.H
+++ b/src/fvMotionSolver/fvMotionSolvers/displacement/interpolation/displacementInterpolationMotionSolver.H
@@ -36,6 +36,9 @@ Description
 
     Tables are in the \a constant/tables directory.
 
+Note
+    could be a motionSolver - does not use any fvMesh structure.
+
 SourceFiles
     displacementInterpolationMotionSolver.C