diff --git a/docs/asciidoc/http-client.adoc b/docs/asciidoc/http-client.adoc
index b65b3e99e7..333381e5d8 100644
--- a/docs/asciidoc/http-client.adoc
+++ b/docs/asciidoc/http-client.adoc
@@ -528,7 +528,9 @@ include::{examplesdir}/resolver/Application.java[lines=18..39]
 <1> The timeout of each DNS query performed by this resolver will be 500ms.
 ====
 
-The following listing shows the available configurations:
+The following listing shows the available configurations.
+Additionally, https://tools.ietf.org/html/rfc7766[`TCP fallback`] is enabled by default.
+
 
 [width="100%",options="header"]
 |=======
diff --git a/docs/asciidoc/tcp-client.adoc b/docs/asciidoc/tcp-client.adoc
index 95d11b4378..a371fbd183 100644
--- a/docs/asciidoc/tcp-client.adoc
+++ b/docs/asciidoc/tcp-client.adoc
@@ -383,7 +383,8 @@ include::{examplesdir}/resolver/Application.java[lines=18..36]
 <1> The timeout of each DNS query performed by this resolver will be 500ms.
 ====
 
-The following listing shows the available configurations:
+The following listing shows the available configurations.
+Additionally, https://tools.ietf.org/html/rfc7766[`TCP fallback`] is enabled by default.
 
 [width="100%",options="header"]
 |=======