diff --git a/tutorials/heatTransfer/chtMultiRegionSimpleFoam/heatExchanger/system/air/fvOptions b/tutorials/heatTransfer/chtMultiRegionSimpleFoam/heatExchanger/system/air/fvOptions
index 00978429d9..475ac8e040 100644
--- a/tutorials/heatTransfer/chtMultiRegionSimpleFoam/heatExchanger/system/air/fvOptions
+++ b/tutorials/heatTransfer/chtMultiRegionSimpleFoam/heatExchanger/system/air/fvOptions
@@ -69,7 +69,7 @@ MRF1
     {
         origin    (0.25 0.25 0.25);
         axis      (0 0 1);
-        omega     5.305; // 500 rpm
+        omega     477.5; // 500 rpm
     }
 }