diff --git a/src/lagrangian/cfdemParticle/subModels/otherForceModel/secondaryPhaseInducedBuoyancy/secondaryPhaseInducedBuoyancy.H b/src/lagrangian/cfdemParticle/subModels/otherForceModel/secondaryPhaseInducedBuoyancy/secondaryPhaseInducedBuoyancy.H
index 1bf6ccd6..098b12b5 100644
--- a/src/lagrangian/cfdemParticle/subModels/otherForceModel/secondaryPhaseInducedBuoyancy/secondaryPhaseInducedBuoyancy.H
+++ b/src/lagrangian/cfdemParticle/subModels/otherForceModel/secondaryPhaseInducedBuoyancy/secondaryPhaseInducedBuoyancy.H
@@ -53,7 +53,9 @@ protected:
         // density dispersed phase - density continuous phase
         dimensionedScalar diffRho_;
 
-        const dimensionedVector g_;
+        word gravityFieldName_;
+
+        const uniformDimensionedVectorField& g_;    // ref to gravity
 
 
 public: