diff --git a/assets/base.mozconfig b/assets/base.mozconfig
index d241d1f..4269fdd 100644
--- a/assets/base.mozconfig
+++ b/assets/base.mozconfig
@@ -54,8 +54,8 @@ export MOZ_OPTIMIZE=1
 
 # SECURITY
 ac_add_options --enable-hardening
+mk_add_options MOZ_HARDENING=1
 ac_add_options --disable-jemalloc
-ac_add_options --enable-safestack
 ac_add_options --enable-pie
 ac_add_options --enable-sandbox
 ac_add_options --enable-fission