diff --git a/splunk_eventgen/lib/eventgentimer.py b/splunk_eventgen/lib/eventgentimer.py
index 1c781563..92a690fd 100644
--- a/splunk_eventgen/lib/eventgentimer.py
+++ b/splunk_eventgen/lib/eventgentimer.py
@@ -32,7 +32,7 @@ def __init__(self, time, sample=None, config=None, genqueue=None, outputqueue=No
         self.profiler = config.profiler
         self.config = config
         self.sample = sample
-        self.end = getattr(self.sample, "end", None)
+        self.end = getattr(self.sample, "end") if getattr(self.sample, "end") is not None else -1
         self.endts = getattr(self.sample, "endts", None)
         self.generatorQueue = genqueue
         self.outputQueue = outputqueue