diff --git a/src/cdk/a11y/focus-trap/focus-trap.spec.ts b/src/cdk/a11y/focus-trap/focus-trap.spec.ts
index 5d91fbc4a6f..fbecb2d847d 100644
--- a/src/cdk/a11y/focus-trap/focus-trap.spec.ts
+++ b/src/cdk/a11y/focus-trap/focus-trap.spec.ts
@@ -101,6 +101,7 @@ describe('FocusTrap', () => {
       ) as HTMLElement[];
 
       expect(anchors.every(current => current.getAttribute('tabindex') === '0')).toBe(true);
+      expect(anchors.every(current => current.getAttribute('aria-hidden') === 'true')).toBe(true);
 
       fixture.componentInstance._isFocusTrapEnabled = false;
       fixture.detectChanges();
diff --git a/src/cdk/a11y/focus-trap/focus-trap.ts b/src/cdk/a11y/focus-trap/focus-trap.ts
index 21450553723..0a62e0629ea 100644
--- a/src/cdk/a11y/focus-trap/focus-trap.ts
+++ b/src/cdk/a11y/focus-trap/focus-trap.ts
@@ -304,6 +304,7 @@ export class FocusTrap {
     this._toggleAnchorTabIndex(this._enabled, anchor);
     anchor.classList.add('cdk-visually-hidden');
     anchor.classList.add('cdk-focus-trap-anchor');
+    anchor.setAttribute('aria-hidden', 'true');
     return anchor;
   }