diff --git a/LXMF/LXMF.py b/LXMF/LXMF.py
index 23b10b3..c0d3039 100644
--- a/LXMF/LXMF.py
+++ b/LXMF/LXMF.py
@@ -18,6 +18,7 @@ FIELD_RESULTS          = 0x0A
 FIELD_GROUP            = 0x0B
 FIELD_TICKET           = 0x0C
 FIELD_EVENT            = 0x0D
+FIELD_RNR_REFS         = 0x0E
 
 # For usecases such as including custom data structures,
 # embedding or encapsulating other data types or protocols