diff --git a/chrome/content/zotero/xpcom/storage/webdav.js b/chrome/content/zotero/xpcom/storage/webdav.js
index 4012bbe049..a243afd988 100644
--- a/chrome/content/zotero/xpcom/storage/webdav.js
+++ b/chrome/content/zotero/xpcom/storage/webdav.js
@@ -1644,7 +1644,7 @@ Zotero.Sync.Storage.Session.WebDAV.prototype._checkResponse = function (req, obj
 				Zotero.debug(e);
 			}
 			
-			var msg = Zotero.localeString([
+			var msg = Zotero.localeJoin([
 				Zotero.getString('sync.storage.error.webdav.sslCertificateError'),
 				Zotero.getString('sync.storage.error.webdav.loadURLForMoreInfo')
 			]);
@@ -1653,7 +1653,7 @@ Zotero.Sync.Storage.Session.WebDAV.prototype._checkResponse = function (req, obj
 			return;
 		}
 		else if ((secInfo.securityState & Ci.nsIWebProgressListener.STATE_IS_BROKEN) == Ci.nsIWebProgressListener.STATE_IS_BROKEN) {
-			var msg = Zotero.localeString([
+			var msg = Zotero.localeJoin([
 				Zotero.getString('sync.storage.error.webdav.sslConnectionError'),
 				Zotero.getString('sync.storage.error.webdav.loadURLForMoreInfo')
 			]);