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-rw-r--r--ls.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/ls.c b/ls.c
index f09cbbc..0558bb2 100644
--- a/ls.c
+++ b/ls.c
@@ -475,7 +475,7 @@ ls_main(int argc, char * * argv)
/* choose a display format */
if (display_fmt == FMT_AUTO)
- display_fmt = isatty(STDOUT_FILENO) ? FMT_COLUMNS : FMT_SINGLE;
+ display_fmt = isatty(fileno(stdout)) ? FMT_COLUMNS : FMT_SINGLE;
if (argi < argc - 1)
opts |= DISP_DIRNAME; /* 2 or more items? label directories */
#ifdef FEATURE_AUTOWIDTH