diff --git a/lib/http.c b/lib/http.c
index 85528a2218..a784745a8d 100644
--- a/lib/http.c
+++ b/lib/http.c
@@ -3646,7 +3646,7 @@ CURLcode Curl_http_header(struct Curl_easy *data, struct connectdata *conn,
 #endif
             )) {
     CURLcode check =
-      Curl_hsts_parse(data->hsts, data->state.up.hostname,
+      Curl_hsts_parse(data->hsts, conn->host.name,
                       headp + strlen("Strict-Transport-Security:"));
     if(check)
       infof(data, "Illegal STS header skipped");