diff --git a/content/options.js b/content/options.js
index 65c44e6f..aa414e39 100644
--- a/content/options.js
+++ b/content/options.js
@@ -478,7 +478,7 @@ liberator.Options = function () //{{{
                         break;
 
                     case "number":
-                        value = parseInt(value);
+                        value = parseInt(value); // deduce radix
 
                         if (isNaN(value))
                         {
diff --git a/content/util.js b/content/util.js
index de107911..d0ffd2cb 100644
--- a/content/util.js
+++ b/content/util.js
@@ -104,7 +104,7 @@ liberator.util = { //{{{
     {
         const unitVal = ["Bytes", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB"];
         var unitIndex = 0;
-        var tmpNum = parseInt(num) || 0;
+        var tmpNum = parseInt(num, 10) || 0;
         var strNum = [tmpNum + ""];
 
         if (humanReadable)