diff --git a/tutorials/compressible/rhoSimpleFoam/squareBend/system/controlDict b/tutorials/compressible/rhoSimpleFoam/squareBend/system/controlDict
index 441cddd999..6c7373134e 100644
--- a/tutorials/compressible/rhoSimpleFoam/squareBend/system/controlDict
+++ b/tutorials/compressible/rhoSimpleFoam/squareBend/system/controlDict
@@ -53,6 +53,7 @@ functions
     #include "sampling"
     // #include "samplingDebug"
     // #include "sampleCellCentres"
+    #include  "isentropicTotalPressure"
 }
 
 
diff --git a/tutorials/compressible/rhoSimpleFoam/squareBend/system/isentropicTotalPressure b/tutorials/compressible/rhoSimpleFoam/squareBend/system/isentropicTotalPressure
new file mode 100644
index 0000000000..0d62dabe8f
--- /dev/null
+++ b/tutorials/compressible/rhoSimpleFoam/squareBend/system/isentropicTotalPressure
@@ -0,0 +1,11 @@
+isentropicPressure
+{
+    type            pressure;
+    libs            ("libfieldFunctionObjects.so");
+    enabled         yes;
+    writeControl    writeTime;
+    calcIsen        yes;
+    calcTotal       no;
+    calcCoeff       no;
+    result          isenTropicP;
+}