diff --git a/usr.sbin/snapinfo/snapinfo.c b/usr.sbin/snapinfo/snapinfo.c
index 55b54a546b26..3ee66da9317a 100644
--- a/usr.sbin/snapinfo/snapinfo.c
+++ b/usr.sbin/snapinfo/snapinfo.c
@@ -140,7 +140,7 @@ find_snapshot(struct statfs *sfs)
 
 int
 compare_function(const char *path, const struct stat *st, int flags,
-struct FTW * ftwv)
+    struct FTW * ftwv __unused)
 {
 
 	if (flags == FTW_F && st->st_ino == inode) {