diff --git a/ext/curl/interface.c b/ext/curl/interface.c
index e0b9176..6e76ba8 100644
--- a/ext/curl/interface.c
+++ b/ext/curl/interface.c
@@ -2562,9 +2562,9 @@ static int _php_curl_setopt(php_curl *ch, zend_long option, zval *zvalue) /* {{{
                     * use since curl needs a long not an int. */
                    form_error = curl_formadd(&first, &last,
                                         CURLFORM_COPYNAME, string_key->val,
-                                        CURLFORM_NAMELENGTH, (zend_long)string_
key->len,
+                                        CURLFORM_NAMELENGTH, string_key->len,
                                         CURLFORM_COPYCONTENTS, postval->val,
-                                        CURLFORM_CONTENTSLENGTH, (zend_long)Z_S
TRLEN_P(current),
+                                        CURLFORM_CONTENTSLENGTH, postval->len,
                                         CURLFORM_END);

                    if (form_error != CURL_FORMADD_OK) {