diff --git a/src/combustionModels/diffusionMulticomponent/diffusionMulticomponent.C b/src/combustionModels/diffusionMulticomponent/diffusionMulticomponent.C
index fc9bb95df900d35ef76081b70202221f14d5770c..d1d596ecf4cbea7764dfaf724748ea80df3af46b 100644
--- a/src/combustionModels/diffusionMulticomponent/diffusionMulticomponent.C
+++ b/src/combustionModels/diffusionMulticomponent/diffusionMulticomponent.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2015-2016 OpenCFD Ltd.
+    \\  /    A nd           | Copyright (C) 2015-2018 OpenCFD Ltd.
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -407,7 +407,7 @@ diffusionMulticomponent<ReactionThermo, ThermoType>::Qdot() const
                 false
             ),
             this->mesh(),
-            dimensionedScalar(dimEnergy/dimTime, Zero),
+            dimensionedScalar(dimEnergy/dimTime/dimVolume, Zero),
             zeroGradientFvPatchScalarField::typeName
         )
     );
diff --git a/tutorials/combustion/fireFoam/LES/smallPoolFire2D/constant/chemistryProperties b/tutorials/combustion/fireFoam/LES/smallPoolFire2D/constant/chemistryProperties
new file mode 100644
index 0000000000000000000000000000000000000000..c22fa78d78a3c02875c27e37baa127e08b3853a1
--- /dev/null
+++ b/tutorials/combustion/fireFoam/LES/smallPoolFire2D/constant/chemistryProperties
@@ -0,0 +1,41 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  plus                                  |
+|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    location    "constant";
+    object      chemistryProperties;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+chemistryType
+{
+    chemistrySolver   EulerImplicit;
+    chemistryThermo   psi;
+}
+
+chemistry           on;
+
+initialChemicalTimeStep 1e-07;
+
+EulerImplicitCoeffs
+{
+    cTauChem        1;
+    equilibriumRateLimiter off;
+}
+
+odeCoeffs
+{
+    solver          Rosenbrock34;
+    absTol          1e-12;
+    relTol          0.01;
+}
+
+// ************************************************************************* //