diff --git a/zerver/worker/queue_processors.py b/zerver/worker/queue_processors.py
index 699a5c534a..b7e82dc2ff 100644
--- a/zerver/worker/queue_processors.py
+++ b/zerver/worker/queue_processors.py
@@ -213,6 +213,8 @@ def retry_send_email_failures(
 class QueueProcessingWorker(ABC):
     queue_name: str
     MAX_CONSUME_SECONDS: Optional[int] = 30
+    # The MAX_CONSUME_SECONDS timeout is only enabled when handling a
+    # single queue at once, with no threads.
     ENABLE_TIMEOUTS = False
     CONSUME_ITERATIONS_BEFORE_UPDATE_STATS_NUM = 50
     MAX_SECONDS_BEFORE_UPDATE_STATS = 30