diff --git a/src/dispatch/plugins/dispatch_slack/service.py b/src/dispatch/plugins/dispatch_slack/service.py
index df90a53c8949..252b2ace4fa1 100644
--- a/src/dispatch/plugins/dispatch_slack/service.py
+++ b/src/dispatch/plugins/dispatch_slack/service.py
@@ -24,7 +24,7 @@
 class SlackRetryException(Exception):
     def __init__(self, wait_time: int = None):
         self.wait_time = wait_time
-        if wait_time is None:
+        if wait_time:
             super().__init__(f"Retrying slack call in {wait_time} seconds.")
         else:
             super().__init__("Retrying slack call.")