diff --git a/pyanaconda/payload/dnf/payload.py b/pyanaconda/payload/dnf/payload.py
index 906088506ae..0943e146701 100644
--- a/pyanaconda/payload/dnf/payload.py
+++ b/pyanaconda/payload/dnf/payload.py
@@ -1303,7 +1303,8 @@ def _refresh_install_tree(self, data: RepoConfigurationData):
             try:
                 proxy = ProxyString(proxy_url)
                 proxies = {"http": proxy.url,
-                           "https": proxy.url}
+                           "https": proxy.url,
+                           "ftp": proxy.url}
             except ProxyStringError as e:
                 log.info("Failed to parse proxy for _getTreeInfo %s: %s",
                          proxy_url, e)