diff --git a/docs/libcurl/opts/CURLOPT_HTTP_VERSION.md b/docs/libcurl/opts/CURLOPT_HTTP_VERSION.md
index 618a7123e9..456970d6fb 100644
--- a/docs/libcurl/opts/CURLOPT_HTTP_VERSION.md
+++ b/docs/libcurl/opts/CURLOPT_HTTP_VERSION.md
@@ -105,7 +105,7 @@ int main(void)
   if(curl) {
     CURLcode ret;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
-    curl_easy_setopt(curl, CURLOPT_HTTP_VERSION, (long)CURL_HTTP_VERSION_2TLS);
+    curl_easy_setopt(curl, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_2TLS);
     ret = curl_easy_perform(curl);
     if(ret == CURLE_HTTP_RETURNED_ERROR) {
       /* an HTTP response error problem */
@@ -114,6 +114,11 @@ int main(void)
 }
 ~~~
 
+# HISTORY
+
+CURL_HTTP_VERSION_\* enums became `long` types in 8.13.0, prior to this version
+a `long` cast is necessary when passing to curl_easy_setopt(3).
+
 # %AVAILABILITY%
 
 # RETURN VALUE