diff --git a/src/idpi/data_source.py b/src/idpi/data_source.py
index db49df42..9604b24e 100644
--- a/src/idpi/data_source.py
+++ b/src/idpi/data_source.py
@@ -19,6 +19,8 @@
 GRIB_DEF = {
     mars.Model.COSMO_1E: "cosmo",
     mars.Model.COSMO_2E: "cosmo",
+    mars.Model.ICON_CH1_EPS: "cosmo",
+    mars.Model.ICON_CH2_EPS: "cosmo",
 }