diff --git a/src/material/datepicker/datepicker-toggle.scss b/src/material/datepicker/datepicker-toggle.scss
index 74b6e5cc8048..5f024c84b629 100644
--- a/src/material/datepicker/datepicker-toggle.scss
+++ b/src/material/datepicker/datepicker-toggle.scss
@@ -1,4 +1,4 @@
-@use '../../cdk/a11y/a11y';
+@import '../../cdk/a11y/a11y';
 
 .mat-form-field-appearance-legacy {
   .mat-form-field-prefix,
@@ -24,7 +24,7 @@
   }
 }
 
-@include a11y.high-contrast(active, off) {
+@include cdk-high-contrast(active, off) {
   .mat-datepicker-toggle-default-icon {
     // On Chromium-based browsers the icon doesn't appear to inherit the text color in high
     // contrast mode so we have to set it explicitly. This is a no-op on IE and Firefox.