diff --git a/src/js/client.js b/src/js/client.js
index ede2cf489..ab5b20711 100644
--- a/src/js/client.js
+++ b/src/js/client.js
@@ -238,6 +238,7 @@ function imageErrorHandler(elem) {
 // binary units (IEC) 1024 based
 function prettyBinarySize(size, fallback) {
     if (!size) return fallback || 0;
+    if (size === -1) return 'Unlimited';
 
     // we can also use KB here (JEDEC)
     var i = Math.floor(Math.log(size) / Math.log(1024));