diff --git a/applications/solvers/multiphase/twoPhaseEulerFoam/interfacialModels/dragModels/IshiiZuber/IshiiZuber.C b/applications/solvers/multiphase/twoPhaseEulerFoam/interfacialModels/dragModels/IshiiZuber/IshiiZuber.C
index b984ac0b1906d668f562dabb2ec19e867990259b..18971fbdc9f7384e782d2a93d0971582c359ca47 100644
--- a/applications/solvers/multiphase/twoPhaseEulerFoam/interfacialModels/dragModels/IshiiZuber/IshiiZuber.C
+++ b/applications/solvers/multiphase/twoPhaseEulerFoam/interfacialModels/dragModels/IshiiZuber/IshiiZuber.C
@@ -74,7 +74,7 @@ Foam::dragModels::IshiiZuber::CdRe() const
     volScalarField muMix
     (
         muc
-       *pow(max(1 - pair_.dispersed(), 1e-3), -2.5*muStar)
+       *pow(max(1 - pair_.dispersed(), scalar(1e-3)), -2.5*muStar)
     );
 
     volScalarField ReM(Re*muc/muMix);