diff --git a/knip.ts b/knip.ts
index 2e962f87e2..f3e8040d8a 100644
--- a/knip.ts
+++ b/knip.ts
@@ -13,9 +13,9 @@ export default {
       ignore: ['scripts/prepack.js'],
       // Strict mode excludes optional dependencies. Read the declared names
       // so removing a declaration still causes an unlisted dependency error.
-      ignoreDependencies: Object.keys(
-        angularQuery.optionalDependencies ?? {},
-      ).map((dependency) => `${dependency}!`),
+      ignoreDependencies: Object.keys(angularQuery.optionalDependencies).map(
+        (dependency) => `${dependency}!`,
+      ),
     },
     'packages/query-codemods': {
       entry: ['src/v4/**/*.cjs', 'src/v5/**/*.cjs'],
diff --git a/tsconfig.json b/tsconfig.json
index 22bbf5db63..af8366184b 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -29,5 +29,5 @@
     "target": "ES2020",
     "types": ["node"]
   },
-  "include": ["*.config.*"]
+  "include": ["*.config.*", "knip.ts"]
 }