diff --git a/bumblebee/modules/ping.py b/bumblebee/modules/ping.py
index dd6f9cc..469871a 100644
--- a/bumblebee/modules/ping.py
+++ b/bumblebee/modules/ping.py
@@ -72,6 +72,6 @@ class Module(bumblebee.engine.Module):
             return
         thread = threading.Thread(target=get_rtt, args=(self,widgets[0],))
         thread.start()
-        self._next_check = int(time.time()) + widgets[0].get("interval")
+        self._next_check = int(time.time()) + int(widgets[0].get("interval"))
 
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