diff --git a/frontend/util.lua b/frontend/util.lua
index 4c9d0c940..3dfebe88e 100644
--- a/frontend/util.lua
+++ b/frontend/util.lua
@@ -47,8 +47,8 @@ function util.gsplit(str, pattern, capture)
 end
 
 --https://gist.github.com/jesseadams/791673
-function util.secondsToClock(sec, withoutSeconds)
-    local seconds = tonumber(sec)
+function util.secondsToClock(seconds, withoutSeconds)
+    seconds = tonumber(seconds)
     if seconds == 0 or seconds ~= seconds then
         if withoutSeconds then
             return "00:00";