diff --git a/Libraries/LibWeb/CSS/StyleProperties.cpp b/Libraries/LibWeb/CSS/StyleProperties.cpp
index 3598bf7148..b95167dfa1 100644
--- a/Libraries/LibWeb/CSS/StyleProperties.cpp
+++ b/Libraries/LibWeb/CSS/StyleProperties.cpp
@@ -79,10 +79,10 @@ Length StyleProperties::length_or_fallback(CSS::PropertyID id, const Length& fal
 LengthBox StyleProperties::length_box(CSS::PropertyID left_id, CSS::PropertyID top_id, CSS::PropertyID right_id, CSS::PropertyID bottom_id) const
 {
     LengthBox box;
-    box.left = length_or_fallback(left_id, {});
-    box.top = length_or_fallback(top_id, {});
-    box.right = length_or_fallback(right_id, {});
-    box.bottom = length_or_fallback(bottom_id, {});
+    box.left = length_or_fallback(left_id, CSS::Length::make_auto());
+    box.top = length_or_fallback(top_id, CSS::Length::make_auto());
+    box.right = length_or_fallback(right_id, CSS::Length::make_auto());
+    box.bottom = length_or_fallback(bottom_id, CSS::Length::make_auto());
     return box;
 }