diff --git a/doc/configuration.txt b/doc/configuration.txt
index 827506788..c93af518e 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -14510,7 +14510,8 @@ ssl_fc_has_sni : boolean
 
 ssl_fc_is_resumed : boolean
   Returns true if the SSL/TLS session has been resumed through the use of
-  SSL session cache or TLS tickets.
+  SSL session cache or TLS tickets on an incoming connection over an SSL/TLS
+  transport layer.
 
 ssl_fc_npn : string
   This extracts the Next Protocol Negotiation field from an incoming connection