diff --git a/src/form.cc b/src/form.cc
index b1bd537..bbde43b 100644
--- a/src/form.cc
+++ b/src/form.cc
@@ -586,7 +586,7 @@ void Html_tag_open_isindex(DilloHtml *html, const char *tag, int tagsize)
    else
       action = a_Url_dup(html->base_url);
 
-   html->formNew(DILLO_HTML_METHOD_GET, action, DILLO_HTML_ENC_URLENCODED,
+   html->formNew(DILLO_HTML_METHOD_GET, action.get(), DILLO_HTML_ENC_URLENCODED,
                  html->charset.has_value() ? html->charset.value().c_str() : nullptr);
    html->InFlags |= IN_FORM;