diff --git a/include/command.h b/include/command.h
index b8c42e1..a2936ad 100644
--- a/include/command.h
+++ b/include/command.h
@@ -46,6 +46,10 @@
 #ifdef	CFG_LONGHELP
 	char		*help;		/* Help  message	(long)	*/
 #endif
+#ifdef CONFIG_AUTO_COMPLETE
+	/* do auto completion on the arguments */
+	int		(*complete)(int argc, char *argv[], char last_char, int maxv, char *cmdv[]);
+#endif
 };
 
 typedef struct cmd_tbl_s	cmd_tbl_t;
@@ -57,6 +61,11 @@
 /* common/command.c */
 cmd_tbl_t *find_cmd(const char *cmd);
 
+#ifdef CONFIG_AUTO_COMPLETE
+extern void install_auto_complete(void);
+extern int cmd_auto_complete(const char *const prompt, char *buf, int *np, int *colp);
+#endif
+
 /*
  * Monitor Command
  *