diff --git a/rlgterm.js b/rlgterm.js
index 0a614e8..a26b26e 100644
--- a/rlgterm.js
+++ b/rlgterm.js
@@ -907,7 +907,7 @@ function idlestr(ms) {
   var hours = Math.floor(minutes / 60);
   if (hours < 24)
     return String(hours) + " hr " + String(minutes % 60) + " min";
-  var days = Math.floor(days / 24);
+  var days = Math.floor(hours / 24);
   if (days == 1)
     return "1 day " + String(hours % 24) + " hr";
   else