diff --git a/pvDataApp/monitor/monitor.h b/pvDataApp/monitor/monitor.h
index 609626b..02a1d0f 100644
--- a/pvDataApp/monitor/monitor.h
+++ b/pvDataApp/monitor/monitor.h
@@ -22,6 +22,7 @@ namespace epics { namespace pvData {
     class MonitorElement {
         public:
         POINTER_DEFINITIONS(MonitorElement);
+        virtual ~MonitorElement(){}
         /**
          * Get the PVStructure.
          * @return The PVStructure.
@@ -47,6 +48,7 @@ namespace epics { namespace pvData {
     class Monitor : public Destroyable, private NoDefaultMethods {
         public:
         POINTER_DEFINITIONS(Monitor);
+        virtual ~Monitor(){}
         /**
          * Start monitoring.
          * @return completion status.
@@ -78,6 +80,7 @@ namespace epics { namespace pvData {
     class MonitorRequester : public virtual Requester {
         public:
         POINTER_DEFINITIONS(MonitorRequester);
+        virtual ~MonitorRequester(){}
         /**
          * The client and server have both completed the createMonitor request.
          * @param status Completion status.
diff --git a/pvDataApp/pv/pvData.h b/pvDataApp/pv/pvData.h
index 82a801d..d6e6bba 100644
--- a/pvDataApp/pv/pvData.h
+++ b/pvDataApp/pv/pvData.h
@@ -53,6 +53,7 @@ private:
 
 class PostHandler {
 public:
+    virtual ~PostHandler(){}
     virtual void postPut() = 0;
 };
 
diff --git a/pvDataApp/pv/pvIntrospect.h b/pvDataApp/pv/pvIntrospect.h
index a6873b9..7cfbe9b 100644
--- a/pvDataApp/pv/pvIntrospect.h
+++ b/pvDataApp/pv/pvIntrospect.h
@@ -62,6 +62,7 @@ namespace ScalarTypeFunc {
 class Field :  public std::tr1::enable_shared_from_this<Field> {
 public:
    POINTER_DEFINITIONS(Field);
+   virtual ~Field();
    String getFieldName() const{return m_fieldName;}
    Type getType() const{return m_type;}
    virtual void toString(StringBuilder buf) const{toString(buf,0);}
@@ -69,7 +70,6 @@ public:
    void renameField(String  newName);
 protected:
    Field(String fieldName,Type type);
-   virtual ~Field();
 private:
    String m_fieldName;
    Type m_type;
@@ -88,6 +88,7 @@ private:
 class Scalar : public Field{
 public:
    POINTER_DEFINITIONS(Scalar);
+   virtual ~Scalar();
    typedef Scalar& reference;
    typedef const Scalar& const_reference;
 
@@ -96,7 +97,6 @@ public:
    virtual void toString(StringBuilder buf,int indentLevel) const;
 protected:
    Scalar(String fieldName,ScalarType scalarType);
-   virtual ~Scalar();
 private:
    ScalarType scalarType;
    friend class FieldCreate;
@@ -105,6 +105,7 @@ private:
 class ScalarArray : public Field{
 public:
    POINTER_DEFINITIONS(ScalarArray);
+   ScalarArray(String fieldName,ScalarType scalarType);
    typedef ScalarArray& reference;
    typedef const ScalarArray& const_reference;
 
@@ -112,7 +113,6 @@ public:
    virtual void toString(StringBuilder buf) const{toString(buf,0);}
    virtual void toString(StringBuilder buf,int indentLevel) const;
 protected:
-   ScalarArray(String fieldName,ScalarType scalarType);
    virtual ~ScalarArray();
 private:
    ScalarType elementType;
@@ -133,13 +133,14 @@ protected:
    StructureArray(String fieldName,StructureConstPtr structure);
    virtual ~StructureArray();
 private:
-    StructureConstPtr pstructure;
+   StructureConstPtr pstructure;
    friend class FieldCreate;
 };
 
 class Structure : public Field {
 public:
    POINTER_DEFINITIONS(Structure);
+   virtual ~Structure();
    typedef Structure& reference;
    typedef const Structure& const_reference;
 
@@ -154,7 +155,6 @@ public:
    virtual void toString(StringBuilder buf,int indentLevel) const;
 protected:
    Structure(String fieldName, int numberFields,FieldConstPtrArray fields);
-   virtual ~Structure();
 private:
     int numberFields;
     FieldConstPtrArray  fields;