diff --git a/crates/bevy_reflect/derive/Cargo.toml b/crates/bevy_reflect/derive/Cargo.toml
index 032046ae2f..b9eaa369cd 100644
--- a/crates/bevy_reflect/derive/Cargo.toml
+++ b/crates/bevy_reflect/derive/Cargo.toml
@@ -20,9 +20,10 @@ functions = []
 
 [dependencies]
 bevy_macro_utils = { path = "../../bevy_macro_utils", version = "0.17.0-dev" }
+indexmap = "2.0"
 proc-macro2 = "1.0"
 quote = "1.0"
-syn = { version = "2.0", features = ["full"] }
+syn = { version = "2.0", features = ["full", "extra-traits"] }
 uuid = { version = "1.13.1", features = ["v4"] }
 
 [target.'cfg(target_arch = "wasm32")'.dependencies]
diff --git a/crates/bevy_reflect/derive/src/derive_data.rs b/crates/bevy_reflect/derive/src/derive_data.rs
index a0343f619f..614f357b37 100644
--- a/crates/bevy_reflect/derive/src/derive_data.rs
+++ b/crates/bevy_reflect/derive/src/derive_data.rs
@@ -1,4 +1,5 @@
 use core::fmt;
+use indexmap::IndexSet;
 use proc_macro2::Span;
 
 use crate::{
@@ -607,9 +608,12 @@ impl<'a> ReflectStruct<'a> {
 
     /// Get a collection of types which are exposed to the reflection API
     pub fn active_types(&self) -> Vec<Type> {
+        // Collect via `IndexSet` to eliminate duplicate types.
         self.active_fields()
             .map(|field| field.reflected_type().clone())
-            .collect()
+            .collect::<IndexSet<_>>()
+            .into_iter()
+            .collect::<Vec<_>>()
     }
 
     /// Get an iterator of fields which are exposed to the reflection API.
@@ -851,9 +855,12 @@ impl<'a> ReflectEnum<'a> {
 
     /// Get a collection of types which are exposed to the reflection API
     pub fn active_types(&self) -> Vec<Type> {
+        // Collect via `IndexSet` to eliminate duplicate types.
         self.active_fields()
             .map(|field| field.reflected_type().clone())
-            .collect()
+            .collect::<IndexSet<_>>()
+            .into_iter()
+            .collect::<Vec<_>>()
     }
 
     /// Get an iterator of fields which are exposed to the reflection API