diff --git a/docs/libcurl/opts/CURLOPT_IPRESOLVE.md b/docs/libcurl/opts/CURLOPT_IPRESOLVE.md
index 1b13e3641d..4e49d06a42 100644
--- a/docs/libcurl/opts/CURLOPT_IPRESOLVE.md
+++ b/docs/libcurl/opts/CURLOPT_IPRESOLVE.md
@@ -66,7 +66,7 @@ int main(void)
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/foo.bin");
 
     /* of all addresses example.com resolves to, only IPv6 ones are used */
-    curl_easy_setopt(curl, CURLOPT_IPRESOLVE, (long)CURL_IPRESOLVE_V6);
+    curl_easy_setopt(curl, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V6);
 
     res = curl_easy_perform(curl);
 
@@ -75,6 +75,11 @@ int main(void)
 }
 ~~~
 
+# HISTORY
+
+CURL_IPRESOLVE_\* macros became `long` types in 8.15.0, before this version
+a `long` cast is necessary when passing to curl_easy_setopt(3).
+
 # %AVAILABILITY%
 
 # RETURN VALUE