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diff --git a/src/Xmobar/Plugins/Monitors/Uptime/FreeBSD.hsc b/src/Xmobar/Plugins/Monitors/Uptime/FreeBSD.hsc
new file mode 100644
index 0000000..e6323e1
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+++ b/src/Xmobar/Plugins/Monitors/Uptime/FreeBSD.hsc
@@ -0,0 +1,52 @@
+------------------------------------------------------------------------------
+-- |
+-- Module      : Plugins.Monitors.Uptime.FreeBSD
+-- Copyright   : (c) 2010 Jose Antonio Ortega Ruiz
+-- License     : BSD3-style (see LICENSE)
+--
+-- Maintainer  : jao@gnu.org
+-- Stability   : unstable
+-- Portability : unportable
+-- Created: Sun Dec 12, 2010 20:26
+--
+--
+-- Uptime
+--
+------------------------------------------------------------------------------
+
+
+module Xmobar.Plugins.Monitors.Uptime.FreeBSD (readUptime) where
+
+import Data.Time.Clock.POSIX (getPOSIXTime)
+import System.BSD.Sysctl
+import Data.Int
+import Foreign.C
+import Foreign.Storable
+
+#include <sys/types.h>
+#include <sys/user.h>
+#include <sys/time.h>
+#include <sys/sysctl.h>
+
+data TimeVal = TimeVal {sec:: CTime}
+
+instance Storable TimeVal where
+  sizeOf _    = #{size struct timeval}
+  alignment _ = alignment (undefined::CTime)
+  peek ptr    = do cSec  <- #{peek struct timeval, tv_sec} ptr
+                   return (TimeVal cSec)
+  poke _ _    = pure ()
+
+now :: IO Int64
+now = do
+    posix <- getPOSIXTime
+    return $ round posix
+
+readUptime :: IO Float
+readUptime = do
+  tv <- sysctlPeek "kern.boottime" :: IO TimeVal
+  nowSec <- now
+  return $ fromInteger $ toInteger $ (nowSec - (secInt $ sec tv))
+  where
+    secInt :: CTime -> Int64
+    secInt (CTime cSec) = cSec