diff --git a/sysmocom/defaults.conf b/sysmocom/defaults.conf
index 8201d05..98852aa 100644
--- a/sysmocom/defaults.conf
+++ b/sysmocom/defaults.conf
@@ -134,12 +134,16 @@
      pci: 0x01
      dl_earfcn: 2850
      rf_port: 0
+     tac: 0x0007
+     root_seq_idx: 204
      scell_list: []
      ncell_list: [0x02]
    - cell_id: 0x02
      pci: 0x02
      dl_earfcn: 2850
      rf_port: 0
+     tac: 0x0007
+     root_seq_idx: 205
      scell_list: []
      ncell_list: [0x01]