diff --git a/docs/src/extend/custom-processors.md b/docs/src/extend/custom-processors.md
index 8f330883b03b..769bdf614be2 100644
--- a/docs/src/extend/custom-processors.md
+++ b/docs/src/extend/custom-processors.md
@@ -65,13 +65,13 @@ type LintMessage = {
   column: number;
 
   /// The 1-based line number of the end location.
-  endLine: number;
+  endLine?: number;
 
   /// The 1-based column number of the end location.
-  endColumn: number;
+  endColumn?: number;
 
   /// If `true`, this is a fatal error.
-  fatal: boolean;
+  fatal?: boolean;
 
   /// Information for an autofix.
   fix: Fix;
diff --git a/docs/src/integrate/nodejs-api.md b/docs/src/integrate/nodejs-api.md
index de035ca731c6..05b5b5d01ebc 100644
--- a/docs/src/integrate/nodejs-api.md
+++ b/docs/src/integrate/nodejs-api.md
@@ -397,9 +397,9 @@ The `LintMessage` value is the information of each linting error. The `messages`
   `true` if this is a fatal error unrelated to a rule, like a parsing error.
 * `message` (`string`)<br>
   The error message.
-* `line` (`number | undefined`)<br>
+* `line` (`number`)<br>
   The 1-based line number of the begin point of this message.
-* `column` (`number | undefined`)<br>
+* `column` (`number`)<br>
   The 1-based column number of the begin point of this message.
 * `endLine` (`number | undefined`)<br>
   The 1-based line number of the end point of this message. This property is undefined if this message is not a range.