diff --git a/.changeset/rotten-olives-shop.md b/.changeset/rotten-olives-shop.md
new file mode 100644
index 0000000000..b7fb51ad06
--- /dev/null
+++ b/.changeset/rotten-olives-shop.md
@@ -0,0 +1,5 @@
+---
+'@backstage/cli': patch
+---
+
+Update `config/eslint.js` to forbid imports of `@material-ui/icons/` as well.
diff --git a/packages/cli/config/eslint.js b/packages/cli/config/eslint.js
index 2a85c307b0..781af13577 100644
--- a/packages/cli/config/eslint.js
+++ b/packages/cli/config/eslint.js
@@ -80,6 +80,10 @@ module.exports = {
             name: '@material-ui/icons',
             message: "Please import '@material-ui/icons/<Icon>' instead.",
           },
+          {
+            name: '@material-ui/icons/', // because this is possible too ._.
+            message: "Please import '@material-ui/icons/<Icon>' instead.",
+          },
           ...require('module').builtinModules,
         ],
         // Avoid cross-package imports