diff --git a/vietnamese/vnless/files/patch-02 b/vietnamese/vnless/files/patch-02
index 8a5f11712c62..a7a90646055f 100644
--- a/vietnamese/vnless/files/patch-02
+++ b/vietnamese/vnless/files/patch-02
@@ -1,6 +1,6 @@
---- less.h.orig	Mon Feb 24 12:45:38 1992
-+++ less.h	Wed Dec  4 02:35:12 1996
-@@ -31,7 +31,11 @@
+--- less.h.orig	1992-02-24 12:45:38.000000000 -0800
++++ less.h	2007-08-23 15:16:23.000000000 -0700
+@@ -31,7 +31,11 @@ typedef long		POSITION;
   * The type of signal handler functions.
   * Usually int, although it should be void.
   */
@@ -12,16 +12,18 @@
  
  
  #define	FILENAME	128	/* Max size of a filename */
-@@ -74,7 +78,12 @@
+@@ -74,7 +78,14 @@ typedef	int		HANDLER;
  #define	SIGNAL(sig,func)	signal(sig,func)
  
  /* Library function declarations */
-+#ifdef USE_FBSD_STD_HDRS
++#ifdef NO_STD_HDRS
  offset_t lseek();
  char *calloc();
 +#else
 +#include <stdlib.h>
 +#include <unistd.h>
++#include <stdio.h>
++#include <string.h>
 +#endif
  
  #include "funcs.h"
diff --git a/vietnamese/vnless/files/patch-ch.c b/vietnamese/vnless/files/patch-ch.c
new file mode 100644
index 000000000000..3928b125f9f6
--- /dev/null
+++ b/vietnamese/vnless/files/patch-ch.c
@@ -0,0 +1,9 @@
+--- ch.c	1992-02-24 12:45:37.000000000 -0800
++++ ../../ch.c	2007-08-23 15:35:14.000000000 -0700
+@@ -7,4 +7,6 @@
+ #include "less.h"
+ 
++static int ch_addbuf(int);
++
+ public int file = -1;		/* File descriptor of the input file */
+ 
diff --git a/vietnamese/vnless/files/patch-decode.c b/vietnamese/vnless/files/patch-decode.c
new file mode 100644
index 000000000000..af82149e0900
--- /dev/null
+++ b/vietnamese/vnless/files/patch-decode.c
@@ -0,0 +1,9 @@
+--- decode.c.orig	1992-02-24 12:45:37.000000000 -0800
++++ decode.c	2007-08-23 15:38:55.000000000 -0700
+@@ -19,4 +19,6 @@
+ #include "cmd.h"
+ 
++static int cmd_search(char *, char *);
++
+ /*
+  * Command table is ordered roughly according to expected