diff --git a/common/hw-config.ads.template b/common/hw-config.ads.template
index a55b230..a45c849 100644
--- a/common/hw-config.ads.template
+++ b/common/hw-config.ads.template
@@ -19,4 +19,8 @@
 
    Default_MMConf_Base : constant := <<DEFAULT_MMCONF_BASE>>;
 
+   ----------------------------------------------------------------------------
+
+   Default_MMConf_Base_Set : constant Boolean := Default_MMConf_Base /= 0;
+
 end HW.Config;