diff --git a/mysql-test/lib/mtr_misc.pl b/mysql-test/lib/mtr_misc.pl
index 3da598faebc..931c93f52a1 100644
--- a/mysql-test/lib/mtr_misc.pl
+++ b/mysql-test/lib/mtr_misc.pl
@@ -18,7 +18,7 @@ sub mtr_file_exists(@);
 sub mtr_exe_exists(@);
 sub mtr_exe_maybe_exists(@);
 sub mtr_copy_dir($$);
-sub mtr_rmtree($$);
+sub mtr_rmtree($);
 sub mtr_same_opts($$);
 sub mtr_cmp_opts($$);