diff --git a/doc/configuration.txt b/doc/configuration.txt
index 55c3e2f..e951959 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -2856,6 +2856,10 @@
   waste some CPU cycles, especially when regular expressions are used, and that
   it is always better to focus the checks on smaller resources.
 
+  Also "http-check expect" doesn't support HTTP keep-alive. Keep in mind that it
+  will automatically append a "Connection: close" header, meaning that this
+  header should not be present in the request provided by "option httpchk".
+
   Last, if "http-check expect" is combined with "http-check disable-on-404",
   then this last one has precedence when the server responds with 404.