unsigned int, unsigned int);
extern int x_create_bitmap_from_file (struct frame *, Lisp_Object);
#if defined (HAVE_XPM) && defined (HAVE_X_WINDOWS)
-extern int x_create_bitmap_from_xpm_data (struct frame *f, char **bits);
+extern int x_create_bitmap_from_xpm_data (struct frame *f, const char **bits);
#endif
#ifndef x_destroy_bitmap
extern void x_destroy_bitmap (struct frame *, int);