diff --git a/packages/mdc-checkbox/_functions.scss b/packages/mdc-checkbox/_functions.scss
index a2ed686ca9b..a51fa2314ef 100644
--- a/packages/mdc-checkbox/_functions.scss
+++ b/packages/mdc-checkbox/_functions.scss
@@ -22,8 +22,6 @@
 
 @import "@material/theme/functions";
 
-$mdc-checkbox-container-keyframes-uid_: -1;
-
 @function mdc-checkbox-transition-enter($property, $delay: 0ms, $duration: $mdc-checkbox-transition-duration) {
   @return mdc-animation-enter($property, $duration, $delay);
 }
@@ -31,9 +29,3 @@ $mdc-checkbox-container-keyframes-uid_: -1;
 @function mdc-checkbox-transition-exit($property, $delay: 0ms, $duration: $mdc-checkbox-transition-duration) {
   @return mdc-animation-exit-temporary($property, $duration, $delay);
 }
-
-@function mdc-checkbox-container-keyframes-uid_() {
-  $mdc-checkbox-container-keyframes-uid_: $mdc-checkbox-container-keyframes-uid_ + 1 !global;
-
-  @return $mdc-checkbox-container-keyframes-uid_;
-}
diff --git a/packages/mdc-checkbox/_mixins.scss b/packages/mdc-checkbox/_mixins.scss
index d2410cd34f3..010c55d6160 100644
--- a/packages/mdc-checkbox/_mixins.scss
+++ b/packages/mdc-checkbox/_mixins.scss
@@ -248,7 +248,7 @@
   }
 
   @if $generate-keyframes {
-    $uid: mdc-checkbox-container-keyframes-uid_();
+    $uid: unique-id();
     $anim-selector: if(&, "&.mdc-checkbox--anim", ".mdc-checkbox--anim");
 
     @include mdc-feature-targets($feat-animation, $feat-color) {