diff --git a/lib/libcurses/curses.h b/lib/libcurses/curses.h
index 730a94a0c16..8b699fac48e 100644
--- a/lib/libcurses/curses.h
+++ b/lib/libcurses/curses.h
@@ -375,11 +375,11 @@ extern int	 __rawmode;
 extern int	 __noqch;
 extern int       __usecs;
 
-int      tputs __P((const char *, int, void (*)(char)));
+int      tputs __P((const char *, int, void (*)(int)));
 
 #else
 
-int      tputs __P((const char *, int, int (*)(char)));
+int      tputs __P((const char *, int, int (*)(int)));
 
 #endif