diff --git a/src/osmo_gsm_tester/templates/srsenb_rr.conf.tmpl b/src/osmo_gsm_tester/templates/srsenb_rr.conf.tmpl
index b1e9cb2..8c06c0d 100644
--- a/src/osmo_gsm_tester/templates/srsenb_rr.conf.tmpl
+++ b/src/osmo_gsm_tester/templates/srsenb_rr.conf.tmpl
@@ -88,7 +88,7 @@
         ${',' if loop.my_num_items != 0 else ''}
         <% loop.my_num_items += 1 %>
         {
-          eci = ${ncell.cell_id};
+          eci = ${hex((int(enb.id)<<8) + int(ncell.cell_id))};
           dl_earfcn = ${ncell.dl_earfcn};
           pci = ${ncell.pci};
         }