diff --git a/protocol/rdm/uid.h b/protocol/rdm/uid.h
index cf33e2e..a0511f6 100644
--- a/protocol/rdm/uid.h
+++ b/protocol/rdm/uid.h
@@ -56,6 +56,8 @@ struct UID {
     uint64_t uid = device | (manufacturer < 32);
     if (flag)
       uid |= (0b1 < 47);
+    else
+      uid |= (0b0 < 47);
     return uid; }
   /**
    * @brief lower 15 bits of the manufacturer