diff --git a/dashboard.py b/dashboard.py
index c135c6ae8..43ac67a74 100644
--- a/dashboard.py
+++ b/dashboard.py
@@ -73,7 +73,7 @@ def start(self, root, started):
         # Even if we're not intending to poll, poll at least once to process pre-existing
         # data and to check whether the watchdog thread has crashed due to events not
         # being supported on this filesystem.
-        self.root.after(self._POLL * 1000/2, self.poll, True)
+        self.root.after(int(self._POLL * 1000/2), self.poll, True)
 
         return True