diff --git a/src/osmo_gsm_tester/resource.py b/src/osmo_gsm_tester/resource.py
index ad8f4b2..bff8282 100644
--- a/src/osmo_gsm_tester/resource.py
+++ b/src/osmo_gsm_tester/resource.py
@@ -109,7 +109,7 @@
         'modem[].features[]': schema.MODEM_FEATURE,
         'modem[].rf_dev_type': schema.STR,
         'modem[].rf_dev_args': schema.STR,
-        'modem[].num_carriers': schema.STR,
+        'modem[].num_carriers': schema.UINT,
         'modem[].additional_args': schema.STR,
         'modem[].airplane_t_on_ms': schema.INT,
         'modem[].airplane_t_off_ms': schema.INT,
diff --git a/src/osmo_gsm_tester/templates/srsue.conf.tmpl b/src/osmo_gsm_tester/templates/srsue.conf.tmpl
index 90925b3..d97b00c 100644
--- a/src/osmo_gsm_tester/templates/srsue.conf.tmpl
+++ b/src/osmo_gsm_tester/templates/srsue.conf.tmpl
@@ -31,7 +31,7 @@
 #                     Default is auto (yes for UHD, no for rest)
 #####################################################################
 [rf]
-% if ue.num_carriers == 2:
+% if int(ue.num_carriers) == 2:
 dl_earfcn = 2850,3050
 % else:
 dl_earfcn = 2850
@@ -143,7 +143,7 @@
 # mbms_service_port: Port of the MBMS service
 #####################################################################
 [rrc]
-% if ue.num_carriers == 2:
+% if int(ue.num_carriers) == 2:
 ue_category       = 7
 release           = 10
 % else: