diff --git a/declarations/WebpackOptions.d.ts b/declarations/WebpackOptions.d.ts
index 372d2b2f6cd..d17488e409e 100644
--- a/declarations/WebpackOptions.d.ts
+++ b/declarations/WebpackOptions.d.ts
@@ -1118,7 +1118,7 @@ export interface OutputOptions {
 	/**
 	 * The filename of the Hot Update Chunks. They are inside the output.path directory.
 	 */
-	hotUpdateChunkFilename?: string | Function;
+	hotUpdateChunkFilename?: string;
 	/**
 	 * The JSONP function used by webpack for async loading of hot update chunks.
 	 */
diff --git a/schemas/WebpackOptions.json b/schemas/WebpackOptions.json
index 1fd61706d84..6154e778ac7 100644
--- a/schemas/WebpackOptions.json
+++ b/schemas/WebpackOptions.json
@@ -940,16 +940,8 @@
         },
         "hotUpdateChunkFilename": {
           "description": "The filename of the Hot Update Chunks. They are inside the output.path directory.",
-          "anyOf": [
-            {
-              "type": "string",
-              "absolutePath": false
-            },
-            {
-              "instanceof": "Function",
-              "tsType": "Function"
-            }
-          ]
+          "type": "string",
+          "absolutePath": false
         },
         "hotUpdateFunction": {
           "description": "The JSONP function used by webpack for async loading of hot update chunks.",