diff --git a/docs/user-guide/nginx-configuration/configmap.md b/docs/user-guide/nginx-configuration/configmap.md
index 0d2cde7f9..c2f3ae99a 100755
--- a/docs/user-guide/nginx-configuration/configmap.md
+++ b/docs/user-guide/nginx-configuration/configmap.md
@@ -511,6 +511,8 @@ The default cipher list is:
 
 The ordering of a ciphersuite is very important because it decides which algorithms are going to be selected in priority. The recommendation above prioritizes algorithms that provide perfect [forward secrecy](https://wiki.mozilla.org/Security/Server_Side_TLS#Forward_Secrecy).
 
+DHE-based cyphers will not be available until DH parameter is configured [Custom DH parameters for perfect forward secrecy](https://github.com/kubernetes/ingress-nginx/tree/master/docs/examples/customization/ssl-dh-param)
+
 Please check the [Mozilla SSL Configuration Generator](https://mozilla.github.io/server-side-tls/ssl-config-generator/).
 
 __Note:__ ssl_prefer_server_ciphers directive will be enabled by default for http context.