$OpenBSD: patch-res_res_calendar_icalendar_c,v 1.1 2021/11/02 12:47:09 sthen Exp $

Index: res/res_calendar_icalendar.c
--- res/res_calendar_icalendar.c.orig
+++ res/res_calendar_icalendar.c
@@ -246,7 +246,7 @@ static void icalendar_add_event(icalcomponent *comp, s
 			ast_string_field_set(event, uid, event->summary);
 		} else {
 			char tmp[100];
-			snprintf(tmp, sizeof(tmp), "%ld", event->start);
+			snprintf(tmp, sizeof(tmp), "%lld", (long long)event->start);
 			ast_string_field_set(event, uid, tmp);
 		}
 	}
