diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/multiRegionHeater/system/controlDict b/tutorials/heatTransfer/chtMultiRegionFoam/multiRegionHeater/system/controlDict
index 074867214b..553afab4a8 100644
--- a/tutorials/heatTransfer/chtMultiRegionFoam/multiRegionHeater/system/controlDict
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/multiRegionHeater/system/controlDict
@@ -47,6 +47,8 @@ runTimeModifiable yes;
 
 maxCo           0.3;
 
+maxDi          10.0;
+
 adjustTimeStep  yes;