diff --git a/src/ioc/db/callback.h b/src/ioc/db/callback.h
index 34224f475..9011446dc 100644
--- a/src/ioc/db/callback.h
+++ b/src/ioc/db/callback.h
@@ -42,7 +42,9 @@ typedef struct callbackPvt {
 	int		priority;
 	void		*user; /*for use by callback user*/
         void            *timer; /*for use by callback itself*/
-}CALLBACK;
+}epicsCallback;
+
+typedef epicsCallback CALLBACK;
 
 typedef void    (*CALLBACKFUNC)(struct callbackPvt*);