diff --git a/CHANGES/7995.doc b/CHANGES/7995.doc
new file mode 100644
index 00000000000..70e3dfa5469
--- /dev/null
+++ b/CHANGES/7995.doc
@@ -0,0 +1 @@
+Fix examples of `fallback_charset_resolver` function in client_advanced documentation. -- by :user:`henry0312`
diff --git a/docs/client_advanced.rst b/docs/client_advanced.rst
index 9e4db7fe23c..64e407d868a 100644
--- a/docs/client_advanced.rst
+++ b/docs/client_advanced.rst
@@ -761,7 +761,7 @@ example, this can be used with the ``chardetng_py`` library.::
 
     def charset_resolver(resp: ClientResponse, body: bytes) -> str:
         tld = resp.url.host.rsplit(".", maxsplit=1)[-1]
-        return detect(body, allow_utf8=True, tld=tld)
+        return detect(body, allow_utf8=True, tld=tld.encode())
 
     ClientSession(fallback_charset_resolver=charset_resolver)
 
@@ -769,4 +769,4 @@ Or, if ``chardetng_py`` doesn't work for you, then ``charset-normalizer`` is ano
 
     from charset_normalizer import detect
 
-    ClientSession(fallback_charset_resolver=lamba r, b: detect(b)["encoding"] or "utf-8")
+    ClientSession(fallback_charset_resolver=lambda r, b: detect(b)["encoding"] or "utf-8")