diff --git a/ddbridge/ddbridge.h b/ddbridge/ddbridge.h
index 3b375cd..834b173 100644
--- a/ddbridge/ddbridge.h
+++ b/ddbridge/ddbridge.h
@@ -125,6 +125,7 @@ struct ddb_regmap {
 	struct ddb_regset *pid_filter;
 	struct ddb_regset *ns;
 	struct ddb_regset *gtl;
+	struct ddb_regset *mdio;
 };
 
 struct ddb_ids {