diff --git a/frontend/ui/timeval.lua b/frontend/ui/timeval.lua
index 28f934839..424442dae 100644
--- a/frontend/ui/timeval.lua
+++ b/frontend/ui/timeval.lua
@@ -13,7 +13,7 @@ function TimeVal:new(o)
     if o.usec == nil then
         o.usec = 0
     elseif o.usec > 1000000 then
-        o.sec = o.sec + maht.floor(o.usec/1000000)
+        o.sec = o.sec + math.floor(o.usec/1000000)
         o.usec = o.usec % 1000000
     end
     setmetatable(o, self)