1 files changed, 1 insertions, 1 deletions
diff --git a/pushover.py b/pushover.py
index 68765dc..2a7c61d 100644
--- a/pushover.py
+++ b/pushover.py
@@ -196,7 +196,7 @@ class Client:
             if key not in valid_keywords:
                 raise ValueError("{0}: invalid message parameter".format(key))
 
-            if key == "timestamp" and value:
+            if key == "timestamp" and value is True:
                 payload[key] = int(time.time())
             elif key == "sound":
                 if not SOUNDS: