diff --git a/applications/solvers/combustion/PDRFoam/createFields.H b/applications/solvers/combustion/PDRFoam/createFields.H
index 70cec41f5b..a0568cd489 100644
--- a/applications/solvers/combustion/PDRFoam/createFields.H
+++ b/applications/solvers/combustion/PDRFoam/createFields.H
@@ -7,7 +7,7 @@ autoPtr<psiuReactionThermo> pThermo
 psiuReactionThermo& thermo = pThermo();
 thermo.validate(args.executable(), "ha", "ea");
 
-basicMultiComponentMixture& composition = thermo.composition();
+basicSpecieMixture& composition = thermo.composition();
 
 volScalarField rho
 (
diff --git a/applications/solvers/combustion/XiFoam/createFields.H b/applications/solvers/combustion/XiFoam/createFields.H
index 4339a3d84b..fa7f36ddf2 100644
--- a/applications/solvers/combustion/XiFoam/createFields.H
+++ b/applications/solvers/combustion/XiFoam/createFields.H
@@ -7,7 +7,7 @@ autoPtr<psiuReactionThermo> pThermo
 psiuReactionThermo& thermo = pThermo();
 thermo.validate(args.executable(), "ha", "ea");
 
-basicMultiComponentMixture& composition = thermo.composition();
+basicSpecieMixture& composition = thermo.composition();
 
 volScalarField rho
 (
diff --git a/applications/solvers/combustion/chemFoam/chemFoam.C b/applications/solvers/combustion/chemFoam/chemFoam.C
index 7e32e64b87..a3e704fcf5 100644
--- a/applications/solvers/combustion/chemFoam/chemFoam.C
+++ b/applications/solvers/combustion/chemFoam/chemFoam.C
@@ -42,7 +42,7 @@ Description
 #include "chemistrySolver.H"
 #include "OFstream.H"
 #include "thermoPhysicsTypes.H"
-#include "basicMultiComponentMixture.H"
+#include "basicSpecieMixture.H"
 #include "cellModel.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
diff --git a/applications/solvers/combustion/chemFoam/createFieldRefs.H b/applications/solvers/combustion/chemFoam/createFieldRefs.H
index fa0fbe2fe9..df659495db 100644
--- a/applications/solvers/combustion/chemFoam/createFieldRefs.H
+++ b/applications/solvers/combustion/chemFoam/createFieldRefs.H
@@ -3,6 +3,6 @@ scalar dtChem = refCast<const BasicChemistryModel<psiReactionThermo>>
 (
     chemistry
 ).deltaTChem()[0];
-basicMultiComponentMixture& composition = thermo.composition();
+basicSpecieMixture& composition = thermo.composition();
 PtrList<volScalarField>& Y = composition.Y();
 volScalarField& p = thermo.p();
diff --git a/applications/solvers/combustion/fireFoam/createFields.H b/applications/solvers/combustion/fireFoam/createFields.H
index 5ce421a6bd..d6f83561b3 100644
--- a/applications/solvers/combustion/fireFoam/createFields.H
+++ b/applications/solvers/combustion/fireFoam/createFields.H
@@ -5,7 +5,7 @@ thermo.validate(args.executable(), "h", "e");
 
 SLGThermo slgThermo(mesh, thermo);
 
-basicMultiComponentMixture& composition = thermo.composition();
+basicSpecieMixture& composition = thermo.composition();
 PtrList<volScalarField>& Y = composition.Y();
 
 const word inertSpecie(thermo.lookup("inertSpecie"));
diff --git a/applications/solvers/combustion/reactingFoam/createFields.H b/applications/solvers/combustion/reactingFoam/createFields.H
index b45da388cd..6efaf1eb8d 100644
--- a/applications/solvers/combustion/reactingFoam/createFields.H
+++ b/applications/solvers/combustion/reactingFoam/createFields.H
@@ -5,7 +5,7 @@ autoPtr<psiReactionThermo> pThermo(psiReactionThermo::New(mesh));
 psiReactionThermo& thermo = pThermo();
 thermo.validate(args.executable(), "h", "e");
 
-basicMultiComponentMixture& composition = thermo.composition();
+basicSpecieMixture& composition = thermo.composition();
 PtrList<volScalarField>& Y = composition.Y();
 
 const word inertSpecie(thermo.lookup("inertSpecie"));
diff --git a/applications/solvers/combustion/reactingFoam/rhoReactingBuoyantFoam/createFields.H b/applications/solvers/combustion/reactingFoam/rhoReactingBuoyantFoam/createFields.H
index 7c28c1879a..4bdfc46d4f 100644
--- a/applications/solvers/combustion/reactingFoam/rhoReactingBuoyantFoam/createFields.H
+++ b/applications/solvers/combustion/reactingFoam/rhoReactingBuoyantFoam/createFields.H
@@ -5,7 +5,7 @@ autoPtr<rhoReactionThermo> pThermo(rhoReactionThermo::New(mesh));
 rhoReactionThermo& thermo = pThermo();
 thermo.validate(args.executable(), "h", "e");
 
-basicMultiComponentMixture& composition = thermo.composition();
+basicSpecieMixture& composition = thermo.composition();
 PtrList<volScalarField>& Y = composition.Y();
 
 const word inertSpecie(thermo.lookup("inertSpecie"));
diff --git a/applications/solvers/combustion/reactingFoam/rhoReactingFoam/createFields.H b/applications/solvers/combustion/reactingFoam/rhoReactingFoam/createFields.H
index 024755ef4d..95524e04ef 100644
--- a/applications/solvers/combustion/reactingFoam/rhoReactingFoam/createFields.H
+++ b/applications/solvers/combustion/reactingFoam/rhoReactingFoam/createFields.H
@@ -5,7 +5,7 @@ autoPtr<rhoReactionThermo> pThermo(rhoReactionThermo::New(mesh));
 rhoReactionThermo& thermo = pThermo();
 thermo.validate(args.executable(), "h", "e");
 
-basicMultiComponentMixture& composition = thermo.composition();
+basicSpecieMixture& composition = thermo.composition();
 PtrList<volScalarField>& Y = composition.Y();
 
 const word inertSpecie(thermo.lookup("inertSpecie"));
diff --git a/src/thermophysicalModels/chemistryModel/chemistryModel/TDACChemistryModel/TDACChemistryModel.C b/src/thermophysicalModels/chemistryModel/chemistryModel/TDACChemistryModel/TDACChemistryModel.C
index b275f735e7..2fe0227eec 100644
--- a/src/thermophysicalModels/chemistryModel/chemistryModel/TDACChemistryModel/TDACChemistryModel.C
+++ b/src/thermophysicalModels/chemistryModel/chemistryModel/TDACChemistryModel/TDACChemistryModel.C
@@ -67,7 +67,7 @@ Foam::TDACChemistryModel<ReactionThermo, ThermoType>::TDACChemistryModel
         dimensionedScalar(dimless, Zero)
     )
 {
-    basicMultiComponentMixture& composition = this->thermo().composition();
+    basicSpecieMixture& composition = this->thermo().composition();
 
     // Store the species composition according to the species index
     speciesTable speciesTab = composition.species();
@@ -611,7 +611,7 @@ Foam::scalar Foam::TDACChemistryModel<ReactionThermo, ThermoType>::solve
 
     label nAdditionalEqn = (tabulation_->variableTimeStep() ? 1 : 0);
 
-    basicMultiComponentMixture& composition = this->thermo().composition();
+    basicSpecieMixture& composition = this->thermo().composition();
 
     // CPU time analysis
     const clockTime clockTime_= clockTime();