diff --git a/src/lagrangian/intermediate/submodels/Reacting/PhaseChangeModel/LiquidEvaporation/LiquidEvaporation.C b/src/lagrangian/intermediate/submodels/Reacting/PhaseChangeModel/LiquidEvaporation/LiquidEvaporation.C
index 61dfb6c6ee..b387a99ea7 100644
--- a/src/lagrangian/intermediate/submodels/Reacting/PhaseChangeModel/LiquidEvaporation/LiquidEvaporation.C
+++ b/src/lagrangian/intermediate/submodels/Reacting/PhaseChangeModel/LiquidEvaporation/LiquidEvaporation.C
@@ -155,7 +155,7 @@ void Foam::LiquidEvaporation<CloudType>::calculate
     const scalarField X(liquids_.X(Yl));
 
     // immediately evaporate mass that has reached critical condition
-    if (mag(T - liquids_.Tc(X)) < SMALL)
+    if ((liquids_.Tc(X) - T) < SMALL)
     {
         if (debug)
         {
diff --git a/src/lagrangian/intermediate/submodels/Reacting/PhaseChangeModel/LiquidEvaporationBoil/LiquidEvaporationBoil.C b/src/lagrangian/intermediate/submodels/Reacting/PhaseChangeModel/LiquidEvaporationBoil/LiquidEvaporationBoil.C
index d78d6b110b..adde0740a0 100644
--- a/src/lagrangian/intermediate/submodels/Reacting/PhaseChangeModel/LiquidEvaporationBoil/LiquidEvaporationBoil.C
+++ b/src/lagrangian/intermediate/submodels/Reacting/PhaseChangeModel/LiquidEvaporationBoil/LiquidEvaporationBoil.C
@@ -155,7 +155,7 @@ void Foam::LiquidEvaporationBoil<CloudType>::calculate
     const scalarField X(liquids_.X(Yl));
 
     // immediately evaporate mass that has reached critical condition
-    if (mag(T - liquids_.Tc(X)) < SMALL)
+    if ((liquids_.Tc(X) - T) < SMALL)
     {
         if (debug)
         {