diff --git a/types/unist/index.d.ts b/types/unist/index.d.ts
index ee61686f93..2d7d37e17f 100644
--- a/types/unist/index.d.ts
+++ b/types/unist/index.d.ts
@@ -4,6 +4,7 @@
 //                 Jun Lu <https://github.com/lujun2>
 //                 Hernan Rajchert <https://github.com/hrajchert>
 //                 Titus Wormer <https://github.com/wooorm>
+//                 Junyoung Choi <https://github.com/rokt33r>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 3.0
 
@@ -26,6 +27,8 @@ export interface Node {
      * Must not be present if a node is generated.
      */
     position?: Position;
+
+    [key: string]: unknown;
 }
 
 /**
diff --git a/types/vfile-message/index.d.ts b/types/vfile-message/index.d.ts
index 908f72027b..5f4467e007 100644
--- a/types/vfile-message/index.d.ts
+++ b/types/vfile-message/index.d.ts
@@ -9,10 +9,6 @@
 import * as Unist from 'unist';
 
 declare namespace vfileMessage {
-    interface AnyNode extends Unist.Node {
-        [key: string]: unknown;
-    }
-
     /**
      * Create a virtual message.
      */
@@ -25,7 +21,7 @@ declare namespace vfileMessage {
          * @param position Place at which the message occurred in a file (`Node`, `Position`, or `Point`, optional).
          * @param origin Place in code the message originates from (`string`, optional).
          */
-        (reason: string | Error, position?: AnyNode | Unist.Position | Unist.Point, origin?: string): VFileMessage;
+        (reason: string | Error, position?: Unist.Node | Unist.Position | Unist.Point, origin?: string): VFileMessage;
         /**
          * Category of message.
          */
diff --git a/types/vfile/index.d.ts b/types/vfile/index.d.ts
index efb07e288d..aec7ca88f9 100644
--- a/types/vfile/index.d.ts
+++ b/types/vfile/index.d.ts
@@ -98,7 +98,7 @@ declare namespace vfile {
          * @param position Place at which the message occurred in `vfile`.
          * @param ruleId Category of message.
          */
-        message: (reason: string, position?: Unist.Point | Unist.Position | vfileMessage.AnyNode, ruleId?: string) => vfileMessage.VFileMessage;
+        message: (reason: string, position?: Unist.Point | Unist.Position | Unist.Node, ruleId?: string) => vfileMessage.VFileMessage;
         /**
          * Associates a fatal message with the file, then immediately throws it.
          * Note: fatal errors mean a file is no longer processable.
@@ -107,7 +107,7 @@ declare namespace vfile {
          * @param position Place at which the message occurred in `vfile`.
          * @param ruleId Category of message.
          */
-        fail: (reason: string, position?: Unist.Point | Unist.Position | vfileMessage.AnyNode, ruleId?: string) => never;
+        fail: (reason: string, position?: Unist.Point | Unist.Position | Unist.Node, ruleId?: string) => never;
         /**
          * Associates an informational message with the file, where `fatal` is set to `null`.
          * Calls `message()` internally.
@@ -115,7 +115,7 @@ declare namespace vfile {
          * @param position Place at which the message occurred in `vfile`.
          * @param ruleId Category of message.
          */
-        info: (reason: string, position?: Unist.Point | Unist.Position | vfileMessage.AnyNode, ruleId?: string) => vfileMessage.VFileMessage;
+        info: (reason: string, position?: Unist.Point | Unist.Position | Unist.Node, ruleId?: string) => vfileMessage.VFileMessage;
     }
 }