diff --git a/core/modules/user/css/user.icons.admin.css b/core/modules/user/css/user.icons.admin.css
deleted file mode 100644
index 66c2366..0000000
--- a/core/modules/user/css/user.icons.admin.css
+++ /dev/null
@@ -1,15 +0,0 @@
-/**
- * @file
- * Styling for the user module icons.
- */
-
-/**
- * Toolbar tab icon.
- */
-.toolbar-bar .toolbar-icon-user:before {
-  background-image: url(../../../misc/icons/bebebe/person.svg);
-}
-.toolbar-bar .toolbar-icon-user:active:before,
-.toolbar-bar .toolbar-icon-user.is-active:before {
-  background-image: url(../../../misc/icons/ffffff/person.svg);
-}
diff --git a/core/modules/user/user.libraries.yml b/core/modules/user/user.libraries.yml
index 73e4e15..eb8fdf6 100644
--- a/core/modules/user/user.libraries.yml
+++ b/core/modules/user/user.libraries.yml
@@ -29,6 +29,4 @@ drupal.user.permissions:
 
 drupal.user.icons:
   version: VERSION
-  css:
-    theme:
-      css/user.icons.admin.css: {}
+  css: {}
diff --git a/core/themes/stable/stable.info.yml b/core/themes/stable/stable.info.yml
index 3476833..1e2d3ef 100644
--- a/core/themes/stable/stable.info.yml
+++ b/core/themes/stable/stable.info.yml
@@ -220,10 +220,6 @@ libraries-override:
     css:
       theme:
         css/user.admin.css: css/user/user.admin.css
-  user/drupal.user.icons:
-    css:
-      theme:
-        css/user.icons.admin.css: css/user/user.icons.admin.css
 
   views/views.module:
     css:
@@ -237,3 +233,7 @@ libraries-override:
       theme:
         css/views_ui.admin.theme.css: css/views_ui/views_ui.admin.theme.css
         css/views_ui.contextual.css: css/views_ui/views_ui.contextual.css
+
+libraries-extend:
+  user/drupal.user.icons:
+    - stable/user.icons.admin
diff --git a/core/themes/stable/stable.libraries.yml b/core/themes/stable/stable.libraries.yml
new file mode 100644
index 0000000..a202caa
--- /dev/null
+++ b/core/themes/stable/stable.libraries.yml
@@ -0,0 +1,5 @@
+user.icons.admin:
+  version: VERSION
+  css:
+    theme:
+      css/user/user.icons.admin.css: { weight: -10 }