diff --git a/etc/controlDict b/etc/controlDict
index fd7a52a72e90f2d19b667e047371f53019a15dd9..cb5cee6ddf0187c5d1b34bd08179056968edbb91 100644
--- a/etc/controlDict
+++ b/etc/controlDict
@@ -542,7 +542,7 @@ DebugSwitches
     layered             0;
     lduInterface        0;
     lduInterfaceField   0;
-    lduMatrix           0;
+    lduMatrix           1;
     lduMesh             0;
     leastSquares        0;
     leastSquaresVectors 0;