diff --git a/EExImportDxf.h b/EExImportDxf.h
index efb4072..381ccff 100644
--- a/EExImportDxf.h
+++ b/EExImportDxf.h
@@ -32,6 +32,7 @@ class __declspec( novtable) IImportDxf
    public :
       virtual ~IImportDxf( void) {} 
       virtual bool Import( const std::string& sFile, IGeomDB* pGDB, int nIdGroup, double dScaleFactor = 1) = 0 ;
+      int a = 0;
 } ;
 
 //-----------------------------------------------------------------------------