diff --git a/Cantera/src/PropertyCalculator.h b/Cantera/src/PropertyCalculator.h
index efa37d38a..be69dbe29 100755
--- a/Cantera/src/PropertyCalculator.h
+++ b/Cantera/src/PropertyCalculator.h
@@ -22,6 +22,7 @@ namespace Cantera {
     template<class M>
     class PropertyCalculator {
     public:
+        virtual ~PropertyCalculator(){}
         virtual doublereal value(const M& s) =0;
         virtual string symbol() =0;
     };