diff --git a/codec-http/src/main/java/io/netty/handler/codec/http/websocketx/WebSocketClientHandshaker13.java b/codec-http/src/main/java/io/netty/handler/codec/http/websocketx/WebSocketClientHandshaker13.java
--- a/codec-http/src/main/java/io/netty/handler/codec/http/websocketx/WebSocketClientHandshaker13.java
+++ b/codec-http/src/main/java/io/netty/handler/codec/http/websocketx/WebSocketClientHandshaker13.java
@@ -189,7 +189,7 @@ public WebSocketClientHandshaker13(URI webSocketURL, WebSocketVersion version, S
      * Upgrade: websocket
      * Connection: Upgrade
      * Sec-WebSocket-Key: dGhlIHNhbXBsZSBub25jZQ==
-     * Sec-WebSocket-Origin: http://example.com
+     * Origin: http://example.com
      * Sec-WebSocket-Protocol: chat, superchat
      * Sec-WebSocket-Version: 13
      * </pre>
@@ -225,7 +225,7 @@ protected FullHttpRequest newHandshakeRequest() {
                .set(HttpHeaderNames.CONNECTION, HttpHeaderValues.UPGRADE)
                .set(HttpHeaderNames.SEC_WEBSOCKET_KEY, key)
                .set(HttpHeaderNames.HOST, websocketHostValue(wsURL))
-               .set(HttpHeaderNames.SEC_WEBSOCKET_ORIGIN, websocketOriginValue(wsURL));
+               .set(HttpHeaderNames.ORIGIN, websocketOriginValue(wsURL));
 
         String expectedSubprotocol = expectedSubprotocol();
         if (expectedSubprotocol != null && !expectedSubprotocol.isEmpty()) {
@@ -251,7 +251,7 @@ protected FullHttpRequest newHandshakeRequest() {
      *
      * @param response
      *            HTTP response returned from the server for the request sent by beginOpeningHandshake00().
-     * @throws WebSocketHandshakeException
+     * @throws WebSocketHandshakeException if handshake response is invalid.
      */
     @Override
     protected void verify(FullHttpResponse response) {
diff --git a/codec-http/src/main/java/io/netty/handler/codec/http/websocketx/WebSocketServerHandshaker13.java b/codec-http/src/main/java/io/netty/handler/codec/http/websocketx/WebSocketServerHandshaker13.java
--- a/codec-http/src/main/java/io/netty/handler/codec/http/websocketx/WebSocketServerHandshaker13.java
+++ b/codec-http/src/main/java/io/netty/handler/codec/http/websocketx/WebSocketServerHandshaker13.java
@@ -115,7 +115,7 @@ public WebSocketServerHandshaker13(
      * Upgrade: websocket
      * Connection: Upgrade
      * Sec-WebSocket-Key: dGhlIHNhbXBsZSBub25jZQ==
-     * Sec-WebSocket-Origin: http://example.com
+     * Origin: http://example.com
      * Sec-WebSocket-Protocol: chat, superchat
      * Sec-WebSocket-Version: 13
      * </pre>

diff --git a/codec-http/src/test/java/io/netty/handler/codec/http/websocketx/WebSocketClientHandshaker07Test.java b/codec-http/src/test/java/io/netty/handler/codec/http/websocketx/WebSocketClientHandshaker07Test.java
--- a/codec-http/src/test/java/io/netty/handler/codec/http/websocketx/WebSocketClientHandshaker07Test.java
+++ b/codec-http/src/test/java/io/netty/handler/codec/http/websocketx/WebSocketClientHandshaker07Test.java
@@ -46,7 +46,7 @@ protected CharSequence[] getHandshakeHeaderNames() {
                 HttpHeaderNames.CONNECTION,
                 HttpHeaderNames.SEC_WEBSOCKET_KEY,
                 HttpHeaderNames.HOST,
-                HttpHeaderNames.SEC_WEBSOCKET_ORIGIN,
+                getOriginHeaderName(),
                 HttpHeaderNames.SEC_WEBSOCKET_VERSION,
         };
     }
diff --git a/codec-http/src/test/java/io/netty/handler/codec/http/websocketx/WebSocketClientHandshaker13Test.java b/codec-http/src/test/java/io/netty/handler/codec/http/websocketx/WebSocketClientHandshaker13Test.java
--- a/codec-http/src/test/java/io/netty/handler/codec/http/websocketx/WebSocketClientHandshaker13Test.java
+++ b/codec-http/src/test/java/io/netty/handler/codec/http/websocketx/WebSocketClientHandshaker13Test.java
@@ -15,11 +15,13 @@
  */
 package io.netty.handler.codec.http.websocketx;
 
+import io.netty.handler.codec.http.HttpHeaderNames;
 import io.netty.handler.codec.http.HttpHeaders;
 
 import java.net.URI;
 
 public class WebSocketClientHandshaker13Test extends WebSocketClientHandshaker07Test {
+
     @Override
     protected WebSocketClientHandshaker newHandshaker(URI uri, String subprotocol, HttpHeaders headers,
                                                       boolean absoluteUpgradeUrl) {
@@ -27,4 +29,10 @@ protected WebSocketClientHandshaker newHandshaker(URI uri, String subprotocol, H
           1024, true, true, 10000,
           absoluteUpgradeUrl);
     }
+
+    @Override
+    protected CharSequence getOriginHeaderName() {
+        return HttpHeaderNames.ORIGIN;
+    }
+
 }
diff --git a/codec-http/src/test/java/io/netty/handler/codec/http/websocketx/WebSocketRequestBuilder.java b/codec-http/src/test/java/io/netty/handler/codec/http/websocketx/WebSocketRequestBuilder.java
--- a/codec-http/src/test/java/io/netty/handler/codec/http/websocketx/WebSocketRequestBuilder.java
+++ b/codec-http/src/test/java/io/netty/handler/codec/http/websocketx/WebSocketRequestBuilder.java
@@ -138,7 +138,11 @@ public FullHttpRequest build() {
             headers.set(HttpHeaderNames.SEC_WEBSOCKET_KEY, key);
         }
         if (origin != null) {
-            headers.set(HttpHeaderNames.SEC_WEBSOCKET_ORIGIN, origin);
+            if (version == WebSocketVersion.V13 || version == WebSocketVersion.V00) {
+                headers.set(HttpHeaderNames.ORIGIN, origin);
+            } else {
+                headers.set(HttpHeaderNames.SEC_WEBSOCKET_ORIGIN, origin);
+            }
         }
         if (version != null) {
             headers.set(HttpHeaderNames.SEC_WEBSOCKET_VERSION, version.toHttpHeaderValue());

WebSocketClientHandshaker13 Invalid Handshake
### Expected behavior

Origin Header should be sent on handshake

### Actual behavior

Sec-WebSocket-Origin Header is sent instead which is not a client handshake but rather a server to client origin handshake per the Specification


@davydotcom do you have a reproducer ?
Use websocket client in netty in any way and it’s very easily reproduced code is wrong in handshaker

Sent from my iPhone

> On May 8, 2019, at 3:12 AM, Norman Maurer <notifications@github.com> wrote:
> 
> @davydotcom do you have a reproducer ?
> 
> —
> You are receiving this because you were mentioned.
> Reply to this email directly, view it on GitHub, or mute the thread.

Maybe just open a pr if it’s so easy to fix. Sorry I am very busy atm

> Am 08.05.2019 um 13:17 schrieb David Estes <notifications@github.com>:
> 
> Use websocket client in netty in any way and it’s very easily reproduced code is wrong in handshaker
> 
> Sent from my iPhone
> 
> > On May 8, 2019, at 3:12 AM, Norman Maurer <notifications@github.com> wrote:
> > 
> > @davydotcom do you have a reproducer ?
> > 
> > —
> > You are receiving this because you were mentioned.
> > Reply to this email directly, view it on GitHub, or mute the thread.
> —
> You are receiving this because you commented.
> Reply to this email directly, view it on GitHub, or mute the thread.

org.io.netty.handler.codec.http.websocketx.WebSocketClientHandshaker13Test org.io.netty.handler.codec.http.websocketx.WebSocketClientHandshaker07Test