diff --git a/docs/libcurl/opts/CURLOPT_REDIR_PROTOCOLS.md b/docs/libcurl/opts/CURLOPT_REDIR_PROTOCOLS.md
index 9cbcc57b5f..d76bd0cf0a 100644
--- a/docs/libcurl/opts/CURLOPT_REDIR_PROTOCOLS.md
+++ b/docs/libcurl/opts/CURLOPT_REDIR_PROTOCOLS.md
@@ -97,7 +97,7 @@ int main(int argc, char **argv)
     curl_easy_setopt(curl, CURLOPT_URL, argv[1]);
 
     /* only allow redirects to HTTP and HTTPS URLs */
-    curl_easy_setopt(curl, CURLOPT_REDIR_PROTOCOLS, (long)
+    curl_easy_setopt(curl, CURLOPT_REDIR_PROTOCOLS,
                      CURLPROTO_HTTP | CURLPROTO_HTTPS);
 
     /* Perform the request */
@@ -106,6 +106,11 @@ int main(int argc, char **argv)
 }
 ~~~
 
+# HISTORY
+
+**CURLPROTO_*** macros became `long` types in 8.16.0, prior to this version
+a `long` cast was necessary when passed to curl_easy_setopt(3).
+
 # DEPRECATED
 
 Deprecated since 7.85.0.