--- gambas-3.18.4/gb.pdf/src/CPdfDocument.cpp
+++ gambas-3.18.4/gb.pdf/src/CPdfDocument.cpp
@@ -776,7 +776,8 @@ END_PROPERTY
 BEGIN_PROPERTY(PDFINDEX_title)
 
 	OutlineItem *item = CPDF_index_get(THIS->currindex);
-	return_unicode_string(item->getTitle(), item->getTitleLength());
+	const std::vector<Unicode> &title = item->getTitle();
+	return_unicode_string(title.data(), title.size());
 
 END_PROPERTY