diff --git a/motorApp/MotorSrc/asynMotorAxis.h b/motorApp/MotorSrc/asynMotorAxis.h
index 7cc2c62a..2904b7d8 100644
--- a/motorApp/MotorSrc/asynMotorAxis.h
+++ b/motorApp/MotorSrc/asynMotorAxis.h
@@ -17,11 +17,12 @@
 #include "asynMotorController.h"
 
 /** Class from which motor axis objects are derived. */
-class epicsShareFunc asynMotorAxis {
+class epicsShareClass asynMotorAxis {
 
   public:
   /* This is the constructor for the class. */
   asynMotorAxis(class asynMotorController *pController, int axisNumber);
+  virtual ~asynMotorAxis();
 
   virtual asynStatus setIntegerParam(int index, int value);
   virtual asynStatus setDoubleParam(int index, double value);