diff --git a/docs/libcurl/opts/CURLOPT_POSTFIELDSIZE.md b/docs/libcurl/opts/CURLOPT_POSTFIELDSIZE.md
index 23e3bd3b6c..5871e91d9b 100644
--- a/docs/libcurl/opts/CURLOPT_POSTFIELDSIZE.md
+++ b/docs/libcurl/opts/CURLOPT_POSTFIELDSIZE.md
@@ -54,7 +54,7 @@ int main(void)
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* size of the POST data */
-    curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, (long) strlen(data));
+    curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, (long)strlen(data));
 
     curl_easy_setopt(curl, CURLOPT_POSTFIELDS, data);