diff --git a/etc/templates/singleFluidCHT/templates/materials/water/thermophysicalProperties b/etc/templates/singleFluidCHT/templates/materials/water/thermophysicalProperties
index 2a0efc167..cf821f395 100644
--- a/etc/templates/singleFluidCHT/templates/materials/water/thermophysicalProperties
+++ b/etc/templates/singleFluidCHT/templates/materials/water/thermophysicalProperties
@@ -20,7 +20,7 @@ thermoType
     mixture         pureMixture;
     transport       const;
     thermo          hConst;
-    equationOfState perfectGas;
+    equationOfState perfectFluid;
     specie          specie;
     energy          sensibleEnthalpy;
 }
@@ -32,6 +32,11 @@ mixture
         nMoles      1;
         molWeight   18.0;       // [g/mol]
     }
+    equationOfState
+    {
+        R           3000;      // [J/(kg K)]
+        rho0        1027;      // [kg/m^3]
+    }
     thermodynamics
     {
         Cp          4181;      // [J/(kg K)] at T = 293 K
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/coolingSphere/templates/materials/water/thermophysicalProperties b/tutorials/heatTransfer/chtMultiRegionFoam/coolingSphere/templates/materials/water/thermophysicalProperties
index 2a0efc167..cf821f395 100644
--- a/tutorials/heatTransfer/chtMultiRegionFoam/coolingSphere/templates/materials/water/thermophysicalProperties
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/coolingSphere/templates/materials/water/thermophysicalProperties
@@ -20,7 +20,7 @@ thermoType
     mixture         pureMixture;
     transport       const;
     thermo          hConst;
-    equationOfState perfectGas;
+    equationOfState perfectFluid;
     specie          specie;
     energy          sensibleEnthalpy;
 }
@@ -32,6 +32,11 @@ mixture
         nMoles      1;
         molWeight   18.0;       // [g/mol]
     }
+    equationOfState
+    {
+        R           3000;      // [J/(kg K)]
+        rho0        1027;      // [kg/m^3]
+    }
     thermodynamics
     {
         Cp          4181;      // [J/(kg K)] at T = 293 K