1 files changed, 1 insertions, 1 deletions

diff --git a/coreutils/tac.c b/coreutils/tac.c
index 7951be255..ddadcc7bc 100644
--- a/coreutils/tac.c
+++ b/coreutils/tac.c
@@ -26,7 +26,7 @@ struct lstring {
 };
 
 int tac_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int tac_main(int argc, char **argv)
+int tac_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
         char **name;
         FILE *f;