fixup
diff --git a/dia/diameter_3gpp_ts32_299.dia b/dia/diameter_3gpp_ts32_299.dia
index 01cc8c1..450896b 100644
--- a/dia/diameter_3gpp_ts32_299.dia
+++ b/dia/diameter_3gpp_ts32_299.dia
@@ -33,6 +33,7 @@
 @inherits diameter_3gpp_ts29_212
 @inherits diameter_3gpp_ts29_214
 @inherits diameter_3gpp_ts29_329
+@inherits diameter_3gpp_ts29_229
 
 ;; ===========================================================================