diff --git a/node/node-4.d.ts b/node/node-4.d.ts
index a9d4709a91..0cd3c54a17 100644
--- a/node/node-4.d.ts
+++ b/node/node-4.d.ts
@@ -465,7 +465,7 @@ interface NodeBuffer extends Uint8Array {
     writeFloatBE(value: number, offset: number, noAssert?: boolean): number;
     writeDoubleLE(value: number, offset: number, noAssert?: boolean): number;
     writeDoubleBE(value: number, offset: number, noAssert?: boolean): number;
-    fill(value: any, offset?: number, end?: number): Buffer;
+    fill(value: any, offset?: number, end?: number): this;
     // TODO: encoding param
     indexOf(value: string | number | Buffer, byteOffset?: number): number;
     // TODO: entries
diff --git a/node/node.d.ts b/node/node.d.ts
index 8c30f25809..42621d50c4 100644
--- a/node/node.d.ts
+++ b/node/node.d.ts
@@ -465,7 +465,7 @@ interface NodeBuffer extends Uint8Array {
     writeFloatBE(value: number, offset: number, noAssert?: boolean): number;
     writeDoubleLE(value: number, offset: number, noAssert?: boolean): number;
     writeDoubleBE(value: number, offset: number, noAssert?: boolean): number;
-    fill(value: any, offset?: number, end?: number): Buffer;
+    fill(value: any, offset?: number, end?: number): this;
     // TODO: encoding param
     indexOf(value: string | number | Buffer, byteOffset?: number): number;
     // TODO: entries