diff --git a/src/@types/global.d.ts b/src/@types/global.d.ts
index 8b21002..b975c9b 100644
--- a/src/@types/global.d.ts
+++ b/src/@types/global.d.ts
@@ -1,23 +1,8 @@
+import { type AnchorPositioningPolyfillOptions } from '../polyfill.ts';
+
 export {};
 
 declare global {
-  interface AnchorPositioningPolyfillOptions {
-    // Whether to use `requestAnimationFrame()` when updating target elements’
-    // positions
-    useAnimationFrame?: boolean;
-
-    // An array of explicitly targeted elements to polyfill
-    elements?: HTMLElement[];
-
-    // Whether to exclude elements with eligible inline styles. When not defined
-    // or set to `false`, the polyfill will be applied to all elements that have
-    // eligible inline styles, regardless of whether the `elements` option is
-    // defined. When set to `true`, elements with eligible inline styles listed
-    // in the `elements` option will still be polyfilled, but no other elements
-    // in the document will be implicitly polyfilled.
-    excludeInlineStyles?: boolean;
-  }
-
   interface Window {
     UPDATE_ANCHOR_ON_ANIMATION_FRAME?: boolean;
     ANCHOR_POSITIONING_POLYFILL_OPTIONS?: AnchorPositioningPolyfillOptions;
diff --git a/src/polyfill.ts b/src/polyfill.ts
index b5f9200..b4aa1eb 100644
--- a/src/polyfill.ts
+++ b/src/polyfill.ts
@@ -443,6 +443,23 @@ async function position(rules: AnchorPositions, useAnimationFrame = false) {
   }
 }
 
+export interface AnchorPositioningPolyfillOptions {
+  // Whether to use `requestAnimationFrame()` when updating target elements’
+  // positions
+  useAnimationFrame?: boolean;
+
+  // An array of explicitly targeted elements to polyfill
+  elements?: HTMLElement[];
+
+  // Whether to exclude elements with eligible inline styles. When not defined
+  // or set to `false`, the polyfill will be applied to all elements that have
+  // eligible inline styles, regardless of whether the `elements` option is
+  // defined. When set to `true`, elements with eligible inline styles listed
+  // in the `elements` option will still be polyfilled, but no other elements
+  // in the document will be implicitly polyfilled.
+  excludeInlineStyles?: boolean;
+}
+
 function normalizePolyfillOptions(
   useAnimationFrameOrOption: boolean | AnchorPositioningPolyfillOptions = {},
 ) {