diff --git a/components/style/values/specified/box.rs b/components/style/values/specified/box.rs
index 7030a6693978..146704ce89e6 100644
--- a/components/style/values/specified/box.rs
+++ b/components/style/values/specified/box.rs
@@ -688,6 +688,7 @@ impl SpecifiedValueInfo for Display {
             "contents",
             "flex",
             "flow-root",
+            "flow-root list-item",
             "grid",
             "inline",
             "inline-block",