diff --git a/applications/utilities/mesh/generation/extrude/extrudeToRegionMesh/extrudeToRegionMesh.C b/applications/utilities/mesh/generation/extrude/extrudeToRegionMesh/extrudeToRegionMesh.C
index 79c295e0eb170771cdad14d84531f2f43942a92a..112de47faf92be168361d9d626ee8a027baea00f 100644
--- a/applications/utilities/mesh/generation/extrude/extrudeToRegionMesh/extrudeToRegionMesh.C
+++ b/applications/utilities/mesh/generation/extrude/extrudeToRegionMesh/extrudeToRegionMesh.C
@@ -134,6 +134,7 @@ Notes:
 //#include "ReadFields.H"
 #include "fvMeshTools.H"
 #include "OBJstream.H"
+#include "PatchTools.H"
 
 using namespace Foam;