diff --git a/gio/gdocumentportal.c b/gio/gdocumentportal.c
index 644829a71..276a1dce6 100644
--- a/gio/gdocumentportal.c
+++ b/gio/gdocumentportal.c
@@ -201,6 +201,7 @@ g_document_portal_add_documents (GList       *uris,
   else
     {
       ruris = g_list_copy_deep (uris, (GCopyFunc)g_strdup, NULL);
+      g_variant_builder_clear (&builder);
     }
 
 out: