diff --git a/src/OpenFOAM/meshes/lduMesh/lduMesh.C b/src/OpenFOAM/meshes/lduMesh/lduMesh.C
index 7f8e9b7fa8..0b5ef60532 100644
--- a/src/OpenFOAM/meshes/lduMesh/lduMesh.C
+++ b/src/OpenFOAM/meshes/lduMesh/lduMesh.C
@@ -93,6 +93,7 @@ Foam::Ostream& Foam::operator<<(Ostream& os, const InfoProxy<lduMesh>& ip)
 
 
     // Print actual contents
+    if (lduMesh::debug)
     {
         const labelList& l = addr.lowerAddr();
         const labelList& u = addr.upperAddr();