diff --git a/static/js/unread.js b/static/js/unread.js
index a2c84f611c..a666ba62aa 100644
--- a/static/js/unread.js
+++ b/static/js/unread.js
@@ -336,8 +336,8 @@ exports.get_unread_message_ids = function (message_ids) {
     return _.filter(message_ids, unread_messages.has);
 };
 
-exports.get_unread_messages = function (message) {
-    return _.filter(message, function (message) {
+exports.get_unread_messages = function (messages) {
+    return _.filter(messages, function (message) {
         return unread_messages.has(message.id);
     });
 };