diff --git a/OAIMetadataFormat_JATS.php b/OAIMetadataFormat_JATS.php
index 98fc4cd..5959efb 100644
--- a/OAIMetadataFormat_JATS.php
+++ b/OAIMetadataFormat_JATS.php
@@ -43,7 +43,7 @@ protected function _findJats($record) {
 		// First, look for candidates in the galleys area (published content).
 		if (!$forceJatsTemplate) {
 			foreach ($galleys as $galley) {
-				$galleyFile = Repo::submissionFile()->get($galley->getData('submissionFileId'));
+				$galleyFile = Repo::submissionFile()->get((int) $galley->getData('submissionFileId'));
 				if ($galleyFile && $this->_isCandidateFile($galleyFile)) $candidateFiles[] = $galleyFile;
 			}