diff --git a/src/sampling/Make/files b/src/sampling/Make/files
index b5f1a258c6..f17e7222bd 100644
--- a/src/sampling/Make/files
+++ b/src/sampling/Make/files
@@ -22,6 +22,8 @@ cuttingPlane/cuttingPlane.C
 
 sampledSurface/patch/sampledPatch.C
 sampledSurface/plane/sampledPlane.C
+sampledSurface/isoSurface/isoSurface.C
+sampledSurface/isoSurface/sampledIsoSurface.C
 sampledSurface/sampledSurface/sampledSurface.C
 sampledSurface/sampledSurfaces/sampledSurfaces.C
 sampledSurface/sampledSurfacesFunctionObject/sampledSurfacesFunctionObject.C