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-rw-r--r--program/include/rcube_imap.inc2
1 files changed, 1 insertions, 1 deletions
diff --git a/program/include/rcube_imap.inc b/program/include/rcube_imap.inc
index ea80ced10..5be4943e4 100644
--- a/program/include/rcube_imap.inc
+++ b/program/include/rcube_imap.inc
@@ -2494,7 +2494,7 @@ class rcube_imap
if (!$mbox_name)
$mbox_name = $this->mailbox;
- $index = array_flip($this->uid_id_map[$mbox_name]);
+ $index = array_flip((array)$this->uid_id_map[$mbox_name]);
if (isset($index[$id]))
$uid = $index[$id];
else