diff --git a/demos/ncurses_cfg.h b/demos/ncurses_cfg.h
index ad8d1267..6fbfc69c 100644
--- a/demos/ncurses_cfg.h
+++ b/demos/ncurses_cfg.h
@@ -23,6 +23,8 @@
 
 /* Some functions we don't have */
 
+#define __NCURSES_H
+
 #ifdef HAVE_PROTO
 WINDOW *getwin(FILE *filep) { return (WINDOW *)NULL; }
 int putwin(WINDOW *win, FILE *filep) { return ERR; }