diff -Ncr src/bin/idraw/idarrowhead.h src/bin/idraw/idarrowhead.h
*** src/bin/idraw/idarrowhead.h	Thu Dec 12 08:49:19 1991
--- src/bin/idraw/idarrowhead.h	Sat Feb  6 19:05:49 1999
***************
*** 37,42 ****
--- 37,43 ----
  
      virtual Graphic* Copy();
      virtual Graphic& operator = (Graphic&);
+     virtual Arrowhead& operator = (Arrowhead&);
  protected:
      Arrowhead(Coord*, Coord*, Graphic*);