diff --git a/Libraries/WebSocket/RCTWebSocketModule.m b/Libraries/WebSocket/RCTWebSocketModule.m
index 0150cd59582..c0426e947d5 100644
--- a/Libraries/WebSocket/RCTWebSocketModule.m
+++ b/Libraries/WebSocket/RCTWebSocketModule.m
@@ -155,7 +155,8 @@ RCT_EXPORT_METHOD(close:(NSInteger)code reason:(NSString *)reason socketID:(nonn
 - (void)webSocketDidOpen:(RCTSRWebSocket *)webSocket
 {
   [self sendEventWithName:@"websocketOpen" body:@{
-    @"id": webSocket.reactTag
+    @"id": webSocket.reactTag,
+    @"protocol": webSocket.protocol ? webSocket.protocol : @""
   }];
 }
 
diff --git a/Libraries/WebSocket/WebSocket.js b/Libraries/WebSocket/WebSocket.js
index 47d56c7eecd..ccca07c77f2 100644
--- a/Libraries/WebSocket/WebSocket.js
+++ b/Libraries/WebSocket/WebSocket.js
@@ -237,6 +237,7 @@ class WebSocket extends EventTarget(...WEBSOCKET_EVENTS) {
           return;
         }
         this.readyState = this.OPEN;
+        this.protocol = ev.protocol;
         this.dispatchEvent(new WebSocketEvent('open'));
       }),
       this._eventEmitter.addListener('websocketClosed', ev => {
diff --git a/ReactAndroid/src/main/java/com/facebook/react/modules/websocket/WebSocketModule.java b/ReactAndroid/src/main/java/com/facebook/react/modules/websocket/WebSocketModule.java
index c2c4021ed3c..7c776cadef6 100644
--- a/ReactAndroid/src/main/java/com/facebook/react/modules/websocket/WebSocketModule.java
+++ b/ReactAndroid/src/main/java/com/facebook/react/modules/websocket/WebSocketModule.java
@@ -144,6 +144,7 @@ public final class WebSocketModule extends ReactContextBaseJavaModule {
             mWebSocketConnections.put(id, webSocket);
             WritableMap params = Arguments.createMap();
             params.putInt("id", id);
+            params.putString("protocol", response.header("Sec-WebSocket-Protocol", ""));
             sendEvent("websocketOpen", params);
           }