diff --git a/etc/controlDict b/etc/controlDict
index b9c41cb3a4..fba02069de 100644
--- a/etc/controlDict
+++ b/etc/controlDict
@@ -135,7 +135,7 @@ DebugSwitches
     FDIC                0;
     FaceCellWave        0;
     GAMG                0;
-    GAMGAgglomeration   0;
+    GAMGAgglomeration   1;
     GAMGInterface       0;
     GAMGInterfaceField  0;
     Gamma               0;