1 files changed, 2 insertions, 1 deletions

diff --git a/coreutils/sync.c b/coreutils/sync.c
index 9dbdd98aa..5c9d0926f 100644
--- a/coreutils/sync.c
+++ b/coreutils/sync.c
@@ -14,8 +14,9 @@
 /* This is a NOFORK applet. Be very careful! */
 
 int sync_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int sync_main(int argc, char **argv)
+int sync_main(int argc, char **argv ATTRIBUTE_UNUSED)
 {
+        /* coreutils-6.9 compat */
         bb_warn_ignoring_args(argc - 1);
 
         sync();