diff --git a/changelog.d/157.bugfix b/changelog.d/157.bugfix
new file mode 100644
index 00000000..df634230
--- /dev/null
+++ b/changelog.d/157.bugfix
@@ -0,0 +1 @@
+Fix erroneous warning log line when setting the `max_connections` option in a GCM app config.
diff --git a/sygnal/gcmpushkin.py b/sygnal/gcmpushkin.py
index 81473092..a8748031 100644
--- a/sygnal/gcmpushkin.py
+++ b/sygnal/gcmpushkin.py
@@ -97,6 +97,7 @@ class GcmPushkin(ConcurrencyLimitedPushkin):
         "type",
         "api_key",
         "fcm_options",
+        "max_connections",
     } | ConcurrencyLimitedPushkin.UNDERSTOOD_CONFIG_FIELDS
 
     def __init__(self, name, sygnal, config, canonical_reg_id_store):