diff --git a/message.hpp b/message.hpp
index b6b4131..331c5bf 100644
--- a/message.hpp
+++ b/message.hpp
@@ -9,6 +9,7 @@
 enum class PayloadType : uint8_t
 {
     IPMI                  = 0x00,
+    SOL                   = 0x01,
     OPEN_SESSION_REQUEST  = 0x10,
     OPEN_SESSION_RESPONSE = 0x11,
     RAKP1                 = 0x12,