diff --git a/wagtail/wagtailadmin/static_src/wagtailadmin/scss/_mixins.scss b/wagtail/wagtailadmin/static_src/wagtailadmin/scss/_mixins.scss
index ef768a1774..b2a01b31e8 100644
--- a/wagtail/wagtailadmin/static_src/wagtailadmin/scss/_mixins.scss
+++ b/wagtail/wagtailadmin/static_src/wagtailadmin/scss/_mixins.scss
@@ -30,10 +30,11 @@
     }
 }
 
-@mixin unlistimmediate() {
-    /* remove list styles, but only for the immediate element - allow nested lists inside it
-    to keep the default style */
 
+// remove list styles, but only for the immediate element -
+// allow nested lists inside it to keep the default style
+
+@mixin unlistimmediate() {
     margin-top: 0;
     margin-bottom: 0;
     padding-left: 0;