diff --git a/definitions/grib2/local.98.300.def b/definitions/grib2/local.98.300.def
index c127da403..af4d5b866 100644
--- a/definitions/grib2/local.98.300.def
+++ b/definitions/grib2/local.98.300.def
@@ -1,4 +1,5 @@
 # Local definition 300: Multi-dimensional parameters
+# Warning: This is now DEPRECATED. See ECC-1440
 
 codetable[1] dimensionType "grib2/dimensionType.table"=0;