diff --git a/node/index.d.ts b/node/index.d.ts
index abe711e47b..3f3c2088a8 100644
--- a/node/index.d.ts
+++ b/node/index.d.ts
@@ -2087,37 +2087,37 @@ declare module "dgram" {
         addListener(event: "close", listener: () => void): this;
         addListener(event: "error", listener: (err: Error) => void): this;
         addListener(event: "listening", listener: () => void): this;
-        addListener(event: "message", listener: (msg: string, rinfo: AddressInfo) => void): this;
+        addListener(event: "message", listener: (msg: Buffer, rinfo: AddressInfo) => void): this;
 
         emit(event: string, ...args: any[]): boolean;
         emit(event: "close"): boolean;
         emit(event: "error", err: Error): boolean;
         emit(event: "listening"): boolean;
-        emit(event: "message", msg: string, rinfo: AddressInfo): boolean;
+        emit(event: "message", msg: Buffer, rinfo: AddressInfo): boolean;
 
         on(event: string, listener: Function): this;
         on(event: "close", listener: () => void): this;
         on(event: "error", listener: (err: Error) => void): this;
         on(event: "listening", listener: () => void): this;
-        on(event: "message", listener: (msg: string, rinfo: AddressInfo) => void): this;
+        on(event: "message", listener: (msg: Buffer, rinfo: AddressInfo) => void): this;
 
         once(event: string, listener: Function): this;
         once(event: "close", listener: () => void): this;
         once(event: "error", listener: (err: Error) => void): this;
         once(event: "listening", listener: () => void): this;
-        once(event: "message", listener: (msg: string, rinfo: AddressInfo) => void): this;
+        once(event: "message", listener: (msg: Buffer, rinfo: AddressInfo) => void): this;
 
         prependListener(event: string, listener: Function): this;
         prependListener(event: "close", listener: () => void): this;
         prependListener(event: "error", listener: (err: Error) => void): this;
         prependListener(event: "listening", listener: () => void): this;
-        prependListener(event: "message", listener: (msg: string, rinfo: AddressInfo) => void): this;
+        prependListener(event: "message", listener: (msg: Buffer, rinfo: AddressInfo) => void): this;
 
         prependOnceListener(event: string, listener: Function): this;
         prependOnceListener(event: "close", listener: () => void): this;
         prependOnceListener(event: "error", listener: (err: Error) => void): this;
         prependOnceListener(event: "listening", listener: () => void): this;
-        prependOnceListener(event: "message", listener: (msg: string, rinfo: AddressInfo) => void): this;
+        prependOnceListener(event: "message", listener: (msg: Buffer, rinfo: AddressInfo) => void): this;
     }
 }
 
diff --git a/node/node-tests.ts b/node/node-tests.ts
index ab6b9e0bce..1be4a870ed 100644
--- a/node/node-tests.ts
+++ b/node/node-tests.ts
@@ -927,7 +927,7 @@ namespace dgram_tests {
         })
         _socket = _socket.addListener("listening", () => {});
         _socket = _socket.addListener("message", (msg, rinfo) => {
-            let _msg: string = msg;
+            let _msg: Buffer = msg;
             let _rinfo: dgram.AddressInfo = rinfo;
         })
 
@@ -942,7 +942,7 @@ namespace dgram_tests {
         })
         _socket = _socket.on("listening", () => {});
         _socket = _socket.on("message", (msg, rinfo) => {
-            let _msg: string = msg;
+            let _msg: Buffer = msg;
             let _rinfo: dgram.AddressInfo = rinfo;
         })
 
@@ -952,7 +952,7 @@ namespace dgram_tests {
         })
         _socket = _socket.once("listening", () => {});
         _socket = _socket.once("message", (msg, rinfo) => {
-            let _msg: string = msg;
+            let _msg: Buffer = msg;
             let _rinfo: dgram.AddressInfo = rinfo;
         })
 
@@ -962,7 +962,7 @@ namespace dgram_tests {
         })
         _socket = _socket.prependListener("listening", () => {});
         _socket = _socket.prependListener("message", (msg, rinfo) => {
-            let _msg: string = msg;
+            let _msg: Buffer = msg;
             let _rinfo: dgram.AddressInfo = rinfo;
         })
 
@@ -972,7 +972,7 @@ namespace dgram_tests {
         })
         _socket = _socket.prependOnceListener("listening", () => {});
         _socket = _socket.prependOnceListener("message", (msg, rinfo) => {
-            let _msg: string = msg;
+            let _msg: Buffer = msg;
             let _rinfo: dgram.AddressInfo = rinfo;
         })
     }