--- a/sh.decls.h
+++ b/sh.decls.h
@@ -379,8 +379,8 @@ extern	void		  mypipe	(int *);
 extern	struct varent 	 *adrof1	(const Char *, struct varent *);
 extern	void		  doset		(Char **, struct command *);
 extern	void		  dolet		(Char **, struct command *);
-extern	Char		 *putn		(tcsh_number_t);
-extern	tcsh_number_t	  getn		(const Char *);
+extern	Char		 *putn		(unsigned tcsh_number_t);
+extern	unsigned tcsh_number_t	  getn		(const Char *);
 extern	Char		 *value1	(Char *, struct varent *);
 extern	void		  setcopy	(const Char *, const Char *, int);
 extern	void		  setv		(const Char *, Char *, int);