diff --git a/ci_boost_release.py b/ci_boost_release.py
index 5750027..72e599d 100644
--- a/ci_boost_release.py
+++ b/ci_boost_release.py
@@ -768,6 +768,7 @@ def command_build(self):
                     "a",
                     "-bd",
                     "-mx=7",
+                    "-mmt2",
                     "-ms=on",
                     "-x!" + self.boost_release_name + "/ci_boost_common.py",
                     "-x!" + self.boost_release_name + "/ci_boost_release.py",