diff --git a/applications/utilities/mesh/generation/foamyHexMesh/conformalVoronoiMesh/conformalVoronoiMesh/conformalVoronoiMeshCalcDualMesh.C b/applications/utilities/mesh/generation/foamyHexMesh/conformalVoronoiMesh/conformalVoronoiMesh/conformalVoronoiMeshCalcDualMesh.C
index 3664ea9d3a7f540717a9581a2c78c7612f83f73c..9a8caa304ab5bd72fff4bc74ec564181c3398044 100644
--- a/applications/utilities/mesh/generation/foamyHexMesh/conformalVoronoiMesh/conformalVoronoiMesh/conformalVoronoiMeshCalcDualMesh.C
+++ b/applications/utilities/mesh/generation/foamyHexMesh/conformalVoronoiMesh/conformalVoronoiMesh/conformalVoronoiMeshCalcDualMesh.C
@@ -28,6 +28,7 @@ License
 #include "backgroundMeshDecomposition.H"
 #include "polyMeshGeometry.H"
 #include "indexedCellChecks.H"
+#include "OBJstream.H"
 
 #include "CGAL/Exact_predicates_exact_constructions_kernel.h"
 #include "CGAL/Gmpq.h"