diff --git a/docs/libcurl/opts/CURLOPT_NETRC_FILE.md b/docs/libcurl/opts/CURLOPT_NETRC_FILE.md
index bc69f2b3a8..b2a01252ef 100644
--- a/docs/libcurl/opts/CURLOPT_NETRC_FILE.md
+++ b/docs/libcurl/opts/CURLOPT_NETRC_FILE.md
@@ -60,6 +60,11 @@ int main(void)
 }
 ~~~
 
+# HISTORY
+
+CURL_NETRC_\* 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