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-rw-r--r--libical/src/libical/icaltimezone.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/libical/src/libical/icaltimezone.c b/libical/src/libical/icaltimezone.c
index f7d62a3383..f2e33d3596 100644
--- a/libical/src/libical/icaltimezone.c
+++ b/libical/src/libical/icaltimezone.c
@@ -1120,6 +1120,11 @@ icaltimezone_get_tzid (icaltimezone *zone)
if (!zone)
return NULL;
+ /* Initialize the builtin timezones, to ensure that the UTC timezone has
+ its TZID set. */
+ if (!builtin_timezones)
+ icaltimezone_init_builtin_timezones ();
+
if (!zone->component)
icaltimezone_load_builtin_timezone (zone);