diff --git a/src/OpenFOAM/Make/files b/src/OpenFOAM/Make/files
index f6da7ac808..cb3b166ba5 100644
--- a/src/OpenFOAM/Make/files
+++ b/src/OpenFOAM/Make/files
@@ -709,6 +709,7 @@ meshes/preservePatchTypes/preservePatchTypes.C
 interpolationWeights = interpolations/interpolationWeights
 $(interpolationWeights)/interpolationWeights/interpolationWeights.C
 $(interpolationWeights)/linearInterpolationWeights/linearInterpolationWeights.C
+$(interpolationWeights)/stepInterpolationWeights/stepInterpolationWeights.C
 $(interpolationWeights)/splineInterpolationWeights/splineInterpolationWeights.C
 
 algorithms/indexedOctree/indexedOctreeName.C