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-rw-r--r--src/unexpand.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/src/unexpand.c b/src/unexpand.c
index 27fc6fec5..1341e437c 100644
--- a/src/unexpand.c
+++ b/src/unexpand.c
@@ -1,5 +1,5 @@
/* unexpand - convert blanks to tabs
- Copyright (C) 89, 91, 1995-2004 Free Software Foundation, Inc.
+ Copyright (C) 89, 91, 1995-2005 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -149,8 +149,8 @@ Mandatory arguments to long options are mandatory for short options too.\n\
static void
add_tab_stop (uintmax_t tabval)
{
- uintmax_t column_width =
- tabval - (first_free_tab ? tab_list[first_free_tab - 1] : 0);
+ uintmax_t prev_column = first_free_tab ? tab_list[first_free_tab - 1] : 0;
+ uintmax_t column_width = prev_column <= tabval ? tabval - prev_column : 0;
if (first_free_tab == n_tabs_allocated)
tab_list = x2nrealloc (tab_list, &n_tabs_allocated, sizeof *tab_list);