diff --git a/steel-registry/src/entity_types.rs b/steel-registry/src/entity_types.rs
index d5f7bf25484..8f9f09c183c 100644
--- a/steel-registry/src/entity_types.rs
+++ b/steel-registry/src/entity_types.rs
@@ -16,7 +16,7 @@ pub enum MobCategory {
 
 /// Entity dimensions used for bounding box calculation.
 /// Bounding box is centered on X/Z with Y at entity feet.
-#[derive(Debug, Clone, Copy)]
+#[derive(Debug, Clone, Copy, PartialEq)]
 pub struct EntityDimensions {
     pub width: f32,
     pub height: f32,
@@ -52,7 +52,7 @@ impl EntityDimensions {
 }
 
 /// Behavioral flags for entity collision and interaction.
-#[derive(Debug, Clone, Copy)]
+#[derive(Debug, Clone, Copy, PartialEq)]
 pub struct EntityFlags {
     pub is_pushable: bool,
     pub is_attackable: bool,
@@ -95,6 +95,13 @@ pub struct EntityType {
 
 pub type EntityTypeRef = &'static EntityType;
 
+impl PartialEq for EntityTypeRef {
+    #[expect(clippy::disallowed_methods)] // This IS the PartialEq impl; ptr::eq is correct here
+    fn eq(&self, other: &Self) -> bool {
+        std::ptr::eq(*self, *other)
+    }
+}
+
 pub struct EntityTypeRegistry {
     types_by_id: Vec<EntityTypeRef>,
     types_by_key: FxHashMap<Identifier, usize>,