diff --git a/calexium_lib/CXM_message_constants.anubis b/calexium_lib/CXM_message_constants.anubis
index ce354b2..5bc2359 100644
--- a/calexium_lib/CXM_message_constants.anubis
+++ b/calexium_lib/CXM_message_constants.anubis
@@ -36,6 +36,7 @@ public define Word32 _CXM_UPDATE_SERVICE_MSG_BASIS  = 0x33770800.   //
 public define Word32 _CXM_UPD_SERVICE_ID            = 0x33770801.
 public define Word32 _CXM_UPD_HAS_UPDATE            = 0x33770802.   //
 public define Word32 _CXM_UPD_LIST_CLASS_FILES      = 0x33770803.   // List the files contained in the class path 
+public define Word32 _CXM_UPD_GET_CLASS_FILE        = 0x33770804.   // get the file contained in the class path. Return info for download
 
   // ****************  SERVICE NEGOCIATION ***************
 
--
libgit2 0.21.4