diff --git a/openbsc/include/openbsc/gsm_data.h b/openbsc/include/openbsc/gsm_data.h
index 638b03506..b4a8ef550 100644
--- a/openbsc/include/openbsc/gsm_data.h
+++ b/openbsc/include/openbsc/gsm_data.h
@@ -407,6 +407,9 @@ enum gsm_auth_policy {
 	GSM_AUTH_POLICY_TOKEN, /* accept first, send token per sms, then revoke authorization */
 };
 
+#define GSM_T3101_DEFAULT 10
+#define GSM_T3113_DEFAULT 60
+
 struct gsm_network {
 	/* global parameters */
 	u_int16_t country_code;
diff --git a/openbsc/src/gsm_data.c b/openbsc/src/gsm_data.c
index 8212346ec..88de4c462 100644
--- a/openbsc/src/gsm_data.c
+++ b/openbsc/src/gsm_data.c
@@ -198,6 +198,9 @@ struct gsm_network *gsm_network_init(u_int16_t country_code, u_int16_t network_c
 	net->country_code = country_code;
 	net->network_code = network_code;
 	net->num_bts = 0;
+	net->T3101 = GSM_T3101_DEFAULT;
+	net->T3113 = GSM_T3113_DEFAULT;
+	/* FIXME: initialize all other timers! */
 
 	INIT_LLIST_HEAD(&net->trans_list);
 	INIT_LLIST_HEAD(&net->upqueue);