diff --git a/packages/@ember/-internals/deprecations/index.ts b/packages/@ember/-internals/deprecations/index.ts
index 646093887c2..91a2f2510f4 100644
--- a/packages/@ember/-internals/deprecations/index.ts
+++ b/packages/@ember/-internals/deprecations/index.ts
@@ -154,3 +154,14 @@ export function deprecateUntil(message: string, deprecation: DeprecationObject)
   }
   deprecate(message, deprecation.test, options);
 }
+
+const { EXTEND_PROTOTYPES } = ENV as {
+  EXTEND_PROTOTYPES: { Array?: boolean };
+};
+
+if (EXTEND_PROTOTYPES.Array !== false) {
+  deprecateUntil(
+    'Array prototype extensions are deprecated. Follow the deprecation guide for migration instructions, and set EmberENV.EXTEND_PROTOTYPES to false in your config/environment.js',
+    DEPRECATIONS.DEPRECATE_ARRAY_PROTOTYPE_EXTENSIONS
+  );
+}
diff --git a/packages/@ember/-internals/environment/lib/env.ts b/packages/@ember/-internals/environment/lib/env.ts
index 6547cbe9e6d..ae161ca5a39 100644
--- a/packages/@ember/-internals/environment/lib/env.ts
+++ b/packages/@ember/-internals/environment/lib/env.ts
@@ -1,4 +1,3 @@
-import { DEPRECATIONS, deprecateUntil } from '@ember/-internals/deprecations';
 import { DEBUG } from '@glimmer/env';
 import global from './global';
 
@@ -203,14 +202,6 @@ export const ENV = {
   }
 
   let { EXTEND_PROTOTYPES } = EmberENV;
-
-  if (EXTEND_PROTOTYPES !== false) {
-    deprecateUntil(
-      'Array prototype extensions are deprecated. Follow the deprecation guide for migration instructions, and set EmberENV.EXTEND_PROTOTYPES to false in your config/environment.js',
-      DEPRECATIONS.DEPRECATE_ARRAY_PROTOTYPE_EXTENSIONS
-    );
-  }
-
   if (EXTEND_PROTOTYPES !== undefined) {
     if (typeof EXTEND_PROTOTYPES === 'object' && EXTEND_PROTOTYPES !== null) {
       ENV.EXTEND_PROTOTYPES.Array = EXTEND_PROTOTYPES.Array !== false;