diff --git a/definitions/mars/stream.table b/definitions/mars/stream.table
index d41e21eee..8fb9fb06d 100644
--- a/definitions/mars/stream.table
+++ b/definitions/mars/stream.table
@@ -116,6 +116,7 @@
 1253 ocda Ocean data assimilation
 1254 olda Ocean Long window data assimilation
 1255 gfra Global fire assimilation system reanalysis
+1256 rfsd Retrospective forcing and simulation data
 2231 cnrm Meteo France climate centre
 2232 mpic Max Plank Institute
 2233 ukmo UKMO climate centre