diff --git a/types/node/fs.d.ts b/types/node/fs.d.ts
index b51679c876..f964fcb6f2 100644
--- a/types/node/fs.d.ts
+++ b/types/node/fs.d.ts
@@ -1724,6 +1724,7 @@ declare module "fs" {
         mode?: number;
         autoClose?: boolean;
         start?: number;
+        highWaterMark?: number;
     }): WriteStream;
 
     /**
diff --git a/types/node/v10/fs.d.ts b/types/node/v10/fs.d.ts
index ee94a8af86..a0e40b5f80 100644
--- a/types/node/v10/fs.d.ts
+++ b/types/node/v10/fs.d.ts
@@ -1724,6 +1724,7 @@ declare module "fs" {
         mode?: number;
         autoClose?: boolean;
         start?: number;
+        highWaterMark?: number;
     }): WriteStream;
 
     /**
diff --git a/types/node/v11/fs.d.ts b/types/node/v11/fs.d.ts
index b51679c876..f964fcb6f2 100644
--- a/types/node/v11/fs.d.ts
+++ b/types/node/v11/fs.d.ts
@@ -1724,6 +1724,7 @@ declare module "fs" {
         mode?: number;
         autoClose?: boolean;
         start?: number;
+        highWaterMark?: number;
     }): WriteStream;
 
     /**
diff --git a/types/node/v6/base.d.ts b/types/node/v6/base.d.ts
index eb5d2824df..40214f9184 100644
--- a/types/node/v6/base.d.ts
+++ b/types/node/v6/base.d.ts
@@ -2934,6 +2934,7 @@ declare module "fs" {
         mode?: number;
         autoClose?: boolean;
         start?: number;
+        highWaterMark?: number;
     }): WriteStream;
     export function fdatasync(fd: number, callback: Function): void;
     export function fdatasyncSync(fd: number): void;
diff --git a/types/node/v7/base.d.ts b/types/node/v7/base.d.ts
index 5126fe26d1..7f4b94f552 100644
--- a/types/node/v7/base.d.ts
+++ b/types/node/v7/base.d.ts
@@ -2965,6 +2965,7 @@ declare module "fs" {
         mode?: number;
         autoClose?: boolean;
         start?: number;
+        highWaterMark?: number;
     }): WriteStream;
     export function fdatasync(fd: number, callback: Function): void;
     export function fdatasyncSync(fd: number): void;
diff --git a/types/node/v8/base.d.ts b/types/node/v8/base.d.ts
index aa4e625997..c49cc04ad4 100644
--- a/types/node/v8/base.d.ts
+++ b/types/node/v8/base.d.ts
@@ -4607,6 +4607,7 @@ declare module "fs" {
         mode?: number;
         autoClose?: boolean;
         start?: number;
+        highWaterMark?: number;
     }): WriteStream;
 
     /**
diff --git a/types/node/v9/base.d.ts b/types/node/v9/base.d.ts
index f53cc901e9..a5efd588b7 100644
--- a/types/node/v9/base.d.ts
+++ b/types/node/v9/base.d.ts
@@ -5025,6 +5025,7 @@ declare module "fs" {
         mode?: number;
         autoClose?: boolean;
         start?: number;
+        highWaterMark?: number;
     }): WriteStream;
 
     /**