diff -urN liblouis-2.6.2.old/tools/lou_translate.c liblouis-2.6.2/tools/lou_translate.c
--- liblouis-2.6.2.old/tools/lou_translate.c	2020-05-17 07:37:40.572000000 +0100
+++ liblouis-2.6.2/tools/lou_translate.c	2020-05-17 07:43:28.596000000 +0100
@@ -36,8 +36,6 @@
 #include "progname.h"
 #include "version-etc.h"
 
-#define BUFSIZE MAXSTRING - 4
-
 static int forward_flag = 0;
 static int backward_flag = 0;
 
@@ -58,10 +56,10 @@
 static void 
 translate_input (int forward_translation, char *table_name)
 {
-  char charbuf[BUFSIZE];
+  char charbuf[MAXSTRING];
   char *outputbuf;
-  widechar inbuf[BUFSIZE];
-  widechar transbuf[BUFSIZE];
+  widechar inbuf[MAXSTRING];
+  widechar transbuf[MAXSTRING];
   int inlen;
   int translen;
   int k;
@@ -69,9 +67,9 @@
   int result;
   while (1)
     {
-      translen = BUFSIZE;
+      translen = MAXSTRING;
       k = 0;
-      while ((ch = getchar ()) != '\n' && ch != EOF && k < BUFSIZE-1)
+      while ((ch = getchar ()) != '\n' && ch != EOF && k < MAXSTRING-1)
 	charbuf[k++] = ch;
       if (ch == EOF && k == 0)
 	break;