diff --git a/src/sampling/Make/files b/src/sampling/Make/files
index 6d5b7ad19ead95add8c5b765617b1d571e7709d0..79d377f43f4dec2f00ad17ab54fae25bd53347b2 100644
--- a/src/sampling/Make/files
+++ b/src/sampling/Make/files
@@ -43,6 +43,7 @@ surfWriters = sampledSurface/writers
 $(surfWriters)/surfaceWriter.C
 $(surfWriters)/dx/dxSurfaceWriter.C
 $(surfWriters)/ensight/ensightSurfaceWriter.C
+$(surfWriters)/ensight/ensightPTraits.C
 $(surfWriters)/foamFile/foamFileSurfaceWriter.C
 $(surfWriters)/nastran/nastranSurfaceWriter.C
 $(surfWriters)/proxy/proxySurfaceWriter.C