diff --git a/drivers/atmodem/voicecall.c b/drivers/atmodem/voicecall.c
index 41fd901a..0d3a9fdc 100644
--- a/drivers/atmodem/voicecall.c
+++ b/drivers/atmodem/voicecall.c
@@ -123,6 +123,7 @@ static struct ofono_call *create_call(struct ofono_voicecall *vc, int type,
 	}
 
 	call->clip_validity = clip;
+	call->cnap_validity = CNAP_VALIDITY_NOT_AVAILABLE;
 
 	d->calls = g_slist_insert_sorted(d->calls, call, at_util_call_compare);