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-rw-r--r--res/res_calendar.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/res/res_calendar.c b/res/res_calendar.c
index dfae4985a..eebd7b480 100644
--- a/res/res_calendar.c
+++ b/res/res_calendar.c
@@ -775,7 +775,10 @@ static void *do_notify(void *data)
datastore->inheritance = DATASTORE_INHERIT_FOREVER;
ao2_ref(event, +1);
+
+ ast_channel_lock(chan);
res = ast_channel_datastore_add(chan, datastore);
+ ast_channel_unlock(chan);
if (!(tmpstr = ast_str_create(32))) {
goto notify_cleanup;