diff --git a/docs/topics/autothrottle.rst b/docs/topics/autothrottle.rst
index b83946a58..c9bece753 100644
--- a/docs/topics/autothrottle.rst
+++ b/docs/topics/autothrottle.rst
@@ -88,6 +88,7 @@ The settings used to control the AutoThrottle extension are:
 * :setting:`AUTOTHROTTLE_ENABLED`
 * :setting:`AUTOTHROTTLE_START_DELAY`
 * :setting:`AUTOTHROTTLE_MAX_DELAY`
+* :setting:`AUTOTHROTTLE_TARGET_CONCURRENCY`
 * :setting:`AUTOTHROTTLE_DEBUG`
 * :setting:`CONCURRENT_REQUESTS_PER_DOMAIN`
 * :setting:`CONCURRENT_REQUESTS_PER_IP`