diff --git a/packages/foundation/tools/eslint-config/index.js b/packages/foundation/tools/eslint-config/index.js
index 4b0823a9..e44e5bd7 100644
--- a/packages/foundation/tools/eslint-config/index.js
+++ b/packages/foundation/tools/eslint-config/index.js
@@ -115,7 +115,12 @@ function buildBaseConfig() {
       ],
       '@typescript-eslint/unified-signatures': 'error',
       '@typescript-eslint/strict-boolean-expressions': 'error',
-      '@typescript-eslint/switch-exhaustiveness-check': 'error',
+      '@typescript-eslint/switch-exhaustiveness-check': [
+        'error',
+        {
+          considerDefaultExhaustiveForUnions: true,
+        },
+      ],
       '@typescript-eslint/no-unused-vars': [
         'warn',
         {