diff --git a/chrome/content/zotero/xpcom/utilities b/chrome/content/zotero/xpcom/utilities
index 2d6e330e28..90f6c8aeda 160000
--- a/chrome/content/zotero/xpcom/utilities
+++ b/chrome/content/zotero/xpcom/utilities
@@ -1 +1 @@
-Subproject commit 2d6e330e28f1c46482b93a37e8ceee53af74996c
+Subproject commit 90f6c8aeda15e1433ac24903440ab470bcfbed4f
diff --git a/test/tests/utilities_itemTest.js b/test/tests/utilities_itemTest.js
index f5580f7c9d..b193a5fd27 100644
--- a/test/tests/utilities_itemTest.js
+++ b/test/tests/utilities_itemTest.js
@@ -323,6 +323,21 @@ describe("Zotero.Utilities.Item", function() {
 				'PJ4519 .B99 A65 1976',
 			];
 			checkSort(numbersInOrder);
+
+			numbersInOrder = [
+				'PJ6611.B35 2014',
+				'PJ6611 .Z36 2001',
+			];
+			checkSort(numbersInOrder);
+
+			numbersInOrder = [
+				'PC43 .O95 2016',
+				'PC45 .P4 1976',
+				'PC4074.7 .P46 2000',
+				'PC4075',
+				'PC4075 .P69 2001',
+			];
+			checkSort(numbersInOrder);
 		});
 	});
 });