diff --git a/tutorials/incompressible/simpleFoam/motorBike/system/forceCoeffs b/tutorials/incompressible/simpleFoam/motorBike/system/forceCoeffs
index e308215f26..c1870cfecf 100644
--- a/tutorials/incompressible/simpleFoam/motorBike/system/forceCoeffs
+++ b/tutorials/incompressible/simpleFoam/motorBike/system/forceCoeffs
@@ -8,8 +8,7 @@
 
 forceCoeffs1
 {
-//    type        forceCoeffs;
-    type        forces;
+    type        forceCoeffs;
 
     functionObjectLibs ( "libforces.so" );
 
@@ -31,6 +30,7 @@ forceCoeffs1
     magUInf     20;
     lRef        1.42;        // Wheelbase length
     Aref        0.75;        // Estimated
+    porosity    off;
 
     binData
     {