diff --git a/Userland/Libraries/LibJS/Runtime/Shape.cpp b/Userland/Libraries/LibJS/Runtime/Shape.cpp
index 291f1031cf..d4090418c9 100644
--- a/Userland/Libraries/LibJS/Runtime/Shape.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Shape.cpp
@@ -173,7 +173,7 @@ void Shape::ensure_property_table() const
     }
     transition_chain.append(*this);
 
-    for (auto const& shape : transition_chain) {
+    for (auto const& shape : transition_chain.in_reverse()) {
         if (!shape.m_property_key.is_valid()) {
             // Ignore prototype transitions as they don't affect the key map.
             continue;