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-rw-r--r--classes/BiblioIsisDb.php5
1 files changed, 4 insertions, 1 deletions
diff --git a/classes/BiblioIsisDb.php b/classes/BiblioIsisDb.php
index 3baa529..825b80f 100644
--- a/classes/BiblioIsisDb.php
+++ b/classes/BiblioIsisDb.php
@@ -338,7 +338,10 @@ class BiblioIsisDb implements IsisDb {
// Join subfields and main field if needed.
if (CinisisDb::join_subfields($this->format)) {
- $data[$entry] = $data[$entry]['subfields'];
+ if (isset($data[$entry]['subfields'])) {
+ $data[$entry] = $data[$entry]['subfields'];
+ }
+
if (isset($field)) {
$data[$entry][CinisisDb::main_field_name($this->format, $key)] = $field;
}