diff --git a/RELEASE-NOTES-1.43 b/RELEASE-NOTES-1.43
index 9a66f10b0d9..44a129cf280 100644
--- a/RELEASE-NOTES-1.43
+++ b/RELEASE-NOTES-1.43
@@ -246,6 +246,8 @@ because of Phabricator reports.
 * IMaintainableDatabase::listViews(), deprecated since 1.42, has been removed.
 * IMaintainableDatabase::truncate(), deprecated since 1.42, has been removed.
 * IMaintainableDatabase::textFieldSize() was removed without deprecation.
+* `.list-style-image()` mixin from mediawiki.mixins.less, deprecated since 1.38,
+  has been removed.
 * …
 
 === Deprecations in 1.43 ===
diff --git a/resources/src/mediawiki.less/mediawiki.mixins.less b/resources/src/mediawiki.less/mediawiki.mixins.less
index 997294fca0e..55e2d640017 100644
--- a/resources/src/mediawiki.less/mediawiki.mixins.less
+++ b/resources/src/mediawiki.less/mediawiki.mixins.less
@@ -25,11 +25,6 @@
 	background-image: linear-gradient( to bottom, @startColor @startPos, @endColor @endPos );
 }
 
-// Deprecated in MW v1.38.0, use unprefixed `list-style-image:` now.
-.list-style-image( @url ) {
-	list-style-image: url( @url );
-}
-
 .hyphens( @value: auto ) {
 	& when ( @value = auto ) {
 		// Legacy `word-wrap`; IE 6-11, Edge 12+, Firefox 3.5+, Chrome 4+, Safari 3.1+,