(tac_stdin): Use STDIN_FILENO rather than literal `0' in fstat call.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/tac.c b/src/tac.c
index 416ab64ae..a4436c83d 100644
--- a/src/tac.c
+++ b/src/tac.c
@@ -431,7 +431,7 @@ tac_stdin (void)
      Use fstat instead of checking for errno == ESPIPE because
      lseek doesn't work on some special files but doesn't return an
      error, either. */
-  if (fstat (0, &stats))
+  if (fstat (STDIN_FILENO, &stats))
     {
       error (0, errno, _("standard input"));
       return 1;