diff --git a/packages/mdx/src/utils/mixins.scss b/packages/mdx/src/utils/mixins.scss
index e1eed503..d5a8ab0e 100644
--- a/packages/mdx/src/utils/mixins.scss
+++ b/packages/mdx/src/utils/mixins.scss
@@ -8,4 +8,5 @@
   padding: 0;
   border: none;
   font-size: inherit;
+  outline-color: currentColor;
 }