diff --git a/src/lagrangian/intermediate/parcels/Templates/ReactingMultiphaseParcel/ReactingMultiphaseParcel.H b/src/lagrangian/intermediate/parcels/Templates/ReactingMultiphaseParcel/ReactingMultiphaseParcel.H
index 9bf8a5294d..c3ce7e0073 100644
--- a/src/lagrangian/intermediate/parcels/Templates/ReactingMultiphaseParcel/ReactingMultiphaseParcel.H
+++ b/src/lagrangian/intermediate/parcels/Templates/ReactingMultiphaseParcel/ReactingMultiphaseParcel.H
@@ -87,7 +87,7 @@ public:
 
             //- Fraction of enthalpy retained by parcel due to surface
             //  reactions
-            const scalar hRetentionCoeff_;
+            scalar hRetentionCoeff_;
 
 
     public: