diff --git a/EGkUserObj.h b/EGkUserObj.h
index fdbf061..79daf65 100644
--- a/EGkUserObj.h
+++ b/EGkUserObj.h
@@ -31,7 +31,7 @@ class __declspec( novtable) IUserObj
       virtual IGeomDB* GetGeomDB( void) const = 0 ;
    public :                 // save & load
       virtual bool ToSave( void) const { return false ; }
-      virtual bool Save( STRVECTOR& vString) const { return false ; }
+      virtual bool Save( int nBaseId, STRVECTOR& vString) const { return false ; }
       virtual bool Load( const STRVECTOR& vString, int nBaseGdbId) { return false ; }
    public :                 // show & transform geometry (only if with a GeoObj)
       virtual bool GetDrawPolyLines( POLYLINELIST& lstPL) const { return false ; }