diff --git a/Libraries/LibWeb/Layout/BlockContainer.cpp b/Libraries/LibWeb/Layout/BlockContainer.cpp
index 1ea8b2bbad3..74a791dc62d 100644
--- a/Libraries/LibWeb/Layout/BlockContainer.cpp
+++ b/Libraries/LibWeb/Layout/BlockContainer.cpp
@@ -23,7 +23,7 @@ BlockContainer::~BlockContainer() = default;
 
 Painting::PaintableWithLines const* BlockContainer::paintable_with_lines() const
 {
-    return static_cast<Painting::PaintableWithLines const*>(Box::paintable_box());
+    return as_if<Painting::PaintableWithLines>(Box::paintable_box());
 }
 
 GC::Ptr<Painting::Paintable> BlockContainer::create_paintable() const