diff --git a/ops_bot/alertmanager.py b/ops_bot/alertmanager.py
index 6015dab..4e1dba0 100644
--- a/ops_bot/alertmanager.py
+++ b/ops_bot/alertmanager.py
@@ -56,7 +56,7 @@ def prometheus_alert_to_markdown(
         )
         label_strings = []
         for label_name, label_value in labels.items():
-            logging.debug("got label: ", label_name, label_value)
+            logging.debug(f"got label: {label_name} = {label_value}")
             if label_name.startswith("__"):
                 continue
             if label_name in ignore_labels: