diff --git a/docs/libcurl/opts/CURLOPT_FTPSSLAUTH.md b/docs/libcurl/opts/CURLOPT_FTPSSLAUTH.md
index 5252da7db5..0bb4e11a1f 100644
--- a/docs/libcurl/opts/CURLOPT_FTPSSLAUTH.md
+++ b/docs/libcurl/opts/CURLOPT_FTPSSLAUTH.md
@@ -61,13 +61,18 @@ int main(void)
     curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/file.txt");
     curl_easy_setopt(curl, CURLOPT_USE_SSL, CURLUSESSL_TRY);
     /* funny server, ask for SSL before TLS */
-    curl_easy_setopt(curl, CURLOPT_FTPSSLAUTH, (long)CURLFTPAUTH_SSL);
+    curl_easy_setopt(curl, CURLOPT_FTPSSLAUTH, CURLFTPAUTH_SSL);
     res = curl_easy_perform(curl);
     curl_easy_cleanup(curl);
   }
 }
 ~~~
 
+# HISTORY
+
+CURLFTPAUTH_\* enums became `long` types in 8.16.0, prior to this version
+a `long` cast is necessary when passing to curl_easy_setopt(3).
+
 # %AVAILABILITY%
 
 # RETURN VALUE