1 files changed, 1 insertions, 0 deletions

diff --git a/coreutils/sync.c b/coreutils/sync.c
index 59f0b504a..536c57a17 100644
--- a/coreutils/sync.c
+++ b/coreutils/sync.c
@@ -13,6 +13,7 @@
 #include <unistd.h>
 #include "busybox.h"
 
+int sync_main(int argc, char **argv);
 int sync_main(int argc, char **argv)
 {
         bb_warn_ignoring_args(argc - 1);