diff --git a/src/lagrangian/cfdemParticle/subModels/forceModel/BeetstraDrag/BeetstraDrag.C b/src/lagrangian/cfdemParticle/subModels/forceModel/BeetstraDrag/BeetstraDrag.C
index 59c39254..18381aa3 100644
--- a/src/lagrangian/cfdemParticle/subModels/forceModel/BeetstraDrag/BeetstraDrag.C
+++ b/src/lagrangian/cfdemParticle/subModels/forceModel/BeetstraDrag/BeetstraDrag.C
@@ -148,6 +148,7 @@ void BeetstraDrag::setForce() const
     else if (particleCloud_.cg() > 1)
     {
         scaleDia_=particleCloud_.cg();
+        typeCG_[0] = scaleDia_;
         Info << "Beetstra using scale from liggghts cg = " << scaleDia_ << endl;
     }
 
diff --git a/src/lagrangian/cfdemParticle/subModels/forceModel/BeetstraDrag/BeetstraDrag.H b/src/lagrangian/cfdemParticle/subModels/forceModel/BeetstraDrag/BeetstraDrag.H
index c2128855..bc2b1c03 100644
--- a/src/lagrangian/cfdemParticle/subModels/forceModel/BeetstraDrag/BeetstraDrag.H
+++ b/src/lagrangian/cfdemParticle/subModels/forceModel/BeetstraDrag/BeetstraDrag.H
@@ -61,7 +61,7 @@ protected:
 
     mutable scalar scaleDia_;
 
-    scalarList typeCG_;
+    mutable scalarList typeCG_;
 
     mutable scalar scaleDrag_;