diff --git a/tutorials/compressible/sonicFoam/laminar/forwardStep/0/p b/tutorials/compressible/sonicFoam/laminar/forwardStep/0/p
index e4c6d12711..bdbc4f96ce 100644
--- a/tutorials/compressible/sonicFoam/laminar/forwardStep/0/p
+++ b/tutorials/compressible/sonicFoam/laminar/forwardStep/0/p
@@ -32,7 +32,7 @@ boundaryField
         field           p;
         phi             phi;
         rho             rho;
-        psi             psi;
+        psi             thermo:psi;
         gamma           1.4;
         fieldInf        1;
         lInf            3;
diff --git a/tutorials/compressible/sonicFoam/ras/prism/0/p b/tutorials/compressible/sonicFoam/ras/prism/0/p
index a922f0a8a5..c1cc7124ff 100644
--- a/tutorials/compressible/sonicFoam/ras/prism/0/p
+++ b/tutorials/compressible/sonicFoam/ras/prism/0/p
@@ -32,7 +32,7 @@ boundaryField
         field           p;
         phi             phi;
         rho             rho;
-        psi             psi;
+        psi             thermo:psi;
         gamma           1.3;
         fieldInf        100000;
         lInf            1;