diff --git a/Cantera/src/transport/LiquidTransportData.h b/Cantera/src/transport/LiquidTransportData.h
index bc7894439..eb9dfd87f 100644
--- a/Cantera/src/transport/LiquidTransportData.h
+++ b/Cantera/src/transport/LiquidTransportData.h
@@ -93,7 +93,7 @@ namespace Cantera {
     //! Assignment operator
     LTPspecies&  operator=(const LTPspecies& right );
 
-    ~LTPspecies( ) { }
+    virtual ~LTPspecies( ) { }
 
     //! Returns the vector of pure species tranport property
     /*!
@@ -186,6 +186,8 @@ namespace Cantera {
     //! Assignment operator
     LTPspecies_Const&  operator=(const LTPspecies_Const& right );
 
+    virtual ~LTPspecies_Const( ) { }
+
     //! Returns the pure species tranport property
     /*!
      *  The pure species transport property (i.e. pure species viscosity)
@@ -225,6 +227,8 @@ namespace Cantera {
     //! Assignment operator
     LTPspecies_Arrhenius&  operator=(const LTPspecies_Arrhenius& right );
 
+    virtual ~LTPspecies_Arrhenius( ) { }
+
     //! Returns the pure species tranport property
     /*!
      *  The pure species transport property (i.e. pure species viscosity)
@@ -276,6 +280,8 @@ namespace Cantera {
     //! Assignment operator
     LTPspecies_Poly&  operator=(const LTPspecies_Poly& right );
 
+    virtual ~LTPspecies_Poly( ) { }
+
     //! Returns the pure species tranport property
     /*!
      *  The pure species transport property (i.e. pure species viscosity)