diff --git a/lib/cli-engine/cli-engine.js b/lib/cli-engine/cli-engine.js
index 5f327fca1340..be98762118cf 100644
--- a/lib/cli-engine/cli-engine.js
+++ b/lib/cli-engine/cli-engine.js
@@ -308,6 +308,7 @@ function createIgnoreResult(filePath, baseDir) {
         filePath: path.resolve(filePath),
         messages: [
             {
+                ruleId: null,
                 fatal: false,
                 severity: 1,
                 message,
diff --git a/lib/eslint/eslint-helpers.js b/lib/eslint/eslint-helpers.js
index e9faa5ee7e07..8caa54851936 100644
--- a/lib/eslint/eslint-helpers.js
+++ b/lib/eslint/eslint-helpers.js
@@ -607,6 +607,7 @@ function createIgnoreResult(filePath, baseDir) {
         filePath: path.resolve(filePath),
         messages: [
             {
+                ruleId: null,
                 fatal: false,
                 severity: 1,
                 message,
diff --git a/lib/shared/types.js b/lib/shared/types.js
index 233e1d428c7a..b78b0ffad375 100644
--- a/lib/shared/types.js
+++ b/lib/shared/types.js
@@ -101,7 +101,7 @@ module.exports = {};
  * @property {number} line The 1-based line number.
  * @property {string} message The error message.
  * @property {string} [messageId] The ID of the message in the rule's meta.
- * @property {(string|null)} [nodeType] Type of node
+ * @property {(string|null)} nodeType Type of node
  * @property {string|null} ruleId The ID of the rule which makes this message.
  * @property {0|1|2} severity The severity of this message.
  * @property {Array<{desc?: string, messageId?: string, fix: {range: [number, number], text: string}}>} [suggestions] Information for suggestions.
@@ -117,7 +117,7 @@ module.exports = {};
  * @property {number|undefined} line The 1-based line number.
  * @property {string} message The error message.
  * @property {string} [messageId] The ID of the message in the rule's meta.
- * @property {(string|null)} [nodeType] Type of node
+ * @property {(string|null)} nodeType Type of node
  * @property {string|null} ruleId The ID of the rule which makes this message.
  * @property {0|1|2} severity The severity of this message.
  * @property {Array<{kind: string, justification: string}>} suppressions The suppression info.
diff --git a/tests/lib/eslint/flat-eslint.js b/tests/lib/eslint/flat-eslint.js
index 5279a22ab2d3..9c8eeedb5877 100644
--- a/tests/lib/eslint/flat-eslint.js
+++ b/tests/lib/eslint/flat-eslint.js
@@ -5012,6 +5012,7 @@ describe("FlatESLint", () => {
                         fixableWarningCount: 0,
                         messages: [
                             {
+                                ruleId: null,
                                 fatal: false,
                                 message: "File ignored by default. Use \"--ignore-pattern '!node_modules/*'\" to override.",
                                 severity: 1,