diff --git a/applications/solvers/multiphase/reactingEulerFoam/reactingTwoPhaseEulerFoam/pUf/UEqns.H b/applications/solvers/multiphase/reactingEulerFoam/reactingTwoPhaseEulerFoam/pUf/UEqns.H
index 83c3a9ce7f736029755385c297c4834c9dc205a0..00a0fb8cfe8814a4d727b00e4ff89d3386dd20ca 100644
--- a/applications/solvers/multiphase/reactingEulerFoam/reactingTwoPhaseEulerFoam/pUf/UEqns.H
+++ b/applications/solvers/multiphase/reactingEulerFoam/reactingTwoPhaseEulerFoam/pUf/UEqns.H
@@ -25,7 +25,7 @@ fvVectorMatrix U2Eqn(U2, rho2.dimensions()*U2.dimensions()*dimVol/dimTime);
         U1Eqn =
         (
             fvm::div(alphaRhoPhi1, U1) - fvm::Sp(fvc::div(alphaRhoPhi1), U1)
-          + fvm::Sp(dmdt12, U1) + dmdt21*U2
+          + fvm::Sp(dmdt12, U1) - dmdt12*U2
           + MRF.DDt(alpha1*rho1, U1)
           + phase1.turbulence().divDevRhoReff(U1)
           + Vm*(UgradU1 - (UgradU2 & U2))
@@ -40,7 +40,7 @@ fvVectorMatrix U2Eqn(U2, rho2.dimensions()*U2.dimensions()*dimVol/dimTime);
         U2Eqn =
         (
             fvm::div(alphaRhoPhi2, U2) - fvm::Sp(fvc::div(alphaRhoPhi2), U2)
-          - fvm::Sp(dmdt21, U2) - dmdt12*U1
+          - fvm::Sp(dmdt21, U2) + dmdt21*U1
           + MRF.DDt(alpha2*rho2, U2)
           + phase2.turbulence().divDevRhoReff(U2)
           + Vm*(UgradU2 - (UgradU1 & U1))