diff --git a/src/lagrangian/cfdemParticle/cfdemCloud/cfdemCloud.H b/src/lagrangian/cfdemParticle/cfdemCloud/cfdemCloud.H
index f1d4845b..95352f67 100644
--- a/src/lagrangian/cfdemParticle/cfdemCloud/cfdemCloud.H
+++ b/src/lagrangian/cfdemParticle/cfdemCloud/cfdemCloud.H
@@ -244,7 +244,7 @@ public:
 // public Member Functions
 
     // Access
-       bool allowCFDsubTimestep() { return allowCFDsubTimestep_; }
+       bool allowCFDsubTimestep() const { return allowCFDsubTimestep_; }
 
        void setAllowCFDsubTimestep(bool b) { allowCFDsubTimestep_ = b; }
 
@@ -428,7 +428,7 @@ public:
 
         void otherForces(volVectorField&);
 
-        bool checkPeriodicCells() { return checkPeriodicCells_; }
+        bool checkPeriodicCells() const { return checkPeriodicCells_; }
 };