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-rw-r--r--program/include/rcube_imap.inc3
1 files changed, 3 insertions, 0 deletions
diff --git a/program/include/rcube_imap.inc b/program/include/rcube_imap.inc
index 8bbd9a2c5..859dd3183 100644
--- a/program/include/rcube_imap.inc
+++ b/program/include/rcube_imap.inc
@@ -320,6 +320,9 @@ class rcube_imap
else
$headers_cached = TRUE;
+ if (!is_array(a_msg_headers))
+ return array();
+
// sort headers by a specific col
$a_headers = iil_SortHeaders($a_msg_headers, $sort_field, $sort_order);
// free memory