diff --git a/docs/configuration/configuration.md b/docs/configuration/configuration.md
index d751a4084..7d4fbc959 100644
--- a/docs/configuration/configuration.md
+++ b/docs/configuration/configuration.md
@@ -3661,7 +3661,8 @@ queue_config:
   [ min_shards: <int> | default = 1 ]
   # Maximum number of samples per send.
   [ max_samples_per_send: <int> | default = 2000]
-  # Maximum time a sample will wait in buffer.
+  # Maximum time a sample will wait for a send. The sample might wait less
+  # if the buffer is full. Further time might pass due to potential retries.
   [ batch_send_deadline: <duration> | default = 5s ]
   # Initial retry delay. Gets doubled for every retry.
   [ min_backoff: <duration> | default = 30ms ]