diff --git a/src/octoprint/static/js/app/viewmodels/files.js b/src/octoprint/static/js/app/viewmodels/files.js
index a5d50f8b..f87f9879 100644
--- a/src/octoprint/static/js/app/viewmodels/files.js
+++ b/src/octoprint/static/js/app/viewmodels/files.js
@@ -47,8 +47,8 @@ $(function() {
                 },
                 "size": function(a, b) {
                     // sorts descending
-                    if (b["bytes"] === undefined || a["bytes"] > b["bytes"]) return -1;
-                    if (a["bytes"] < b["bytes"]) return 1;
+                    if (b["size"] === undefined || a["size"] > b["size"]) return -1;
+                    if (a["size"] < b["size"]) return 1;
                     return 0;
                 }
             },