diff --git a/tutorials/multiphase/interFoam/RAS/floatingObject/system/setFieldsDict b/tutorials/multiphase/interFoam/RAS/floatingObject/system/setFieldsDict
index cbd33c338b..972b094a4f 100644
--- a/tutorials/multiphase/interFoam/RAS/floatingObject/system/setFieldsDict
+++ b/tutorials/multiphase/interFoam/RAS/floatingObject/system/setFieldsDict
@@ -29,7 +29,7 @@ regions
 
     boxToCell
     {
-        box (0.7 0.8 -100) (100 100 0.65);
+        box (0.7 0.8 -100) (100 100 0.651);
         fieldValues ( volScalarFieldValue alpha.water 1 );
     }
 );