diff --git a/definitions/mars/class.table b/definitions/mars/class.table
index 8a0537758..307b77554 100644
--- a/definitions/mars/class.table
+++ b/definitions/mars/class.table
@@ -36,6 +36,7 @@
 35 ce Copernicus Emergency Management Service (CEMS)
 36 cr Copernicus Atmosphere Monitoring Service (CAMS) Research
 37 rr Copernicus Regional ReAnalysis (CARRA/CERRA)
+38 ul Project ULYSSES
 99 te Test
 100 at Austria
 101 be Belgium