diff --git a/command/rakp12.hpp b/command/rakp12.hpp
index 1ce533a..95124be 100644
--- a/command/rakp12.hpp
+++ b/command/rakp12.hpp
@@ -10,6 +10,9 @@
 
 constexpr size_t userNameMaxLen = 16;
 
+constexpr uint8_t userNameOnlyLookupMask = 0x10;
+constexpr uint8_t userNameOnlyLookup = 0x10;
+
 /**
  * @struct RAKP1request
  *