diff --git a/src/factory/PVField.cpp b/src/factory/PVField.cpp
index 04a1769..bb4ff1e 100644
--- a/src/factory/PVField.cpp
+++ b/src/factory/PVField.cpp
@@ -24,8 +24,7 @@ using std::string;
 namespace epics { namespace pvData {
 
 PVField::PVField(FieldConstPtr field)
-: notImplemented("not implemented"),
-  parent(NULL),field(field),
+: parent(NULL),field(field),
   fieldOffset(0), nextFieldOffset(0),
   immutable(false)
 {
diff --git a/src/pv/pvData.h b/src/pv/pvData.h
index d68eb04..94e30ee 100644
--- a/src/pv/pvData.h
+++ b/src/pv/pvData.h
@@ -254,7 +254,6 @@ protected:
 private:
     static void computeOffset(const PVField *pvField);
     static void computeOffset(const PVField *pvField,std::size_t offset);
-    std::string notImplemented;
     std::string fieldName;
     PVStructure *parent;
     FieldConstPtr field;