diff --git a/axum/CHANGELOG.md b/axum/CHANGELOG.md
index b0da2436..b669231c 100644
--- a/axum/CHANGELOG.md
+++ b/axum/CHANGELOG.md
@@ -7,7 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 # Unreleased
 
-- None.
+- **fixed:** Don't remove the `Sec-WebSocket-Key` header in `WebSocketUpgrade` ([#1972])
+
+[#1972]: https://github.com/tokio-rs/axum/pull/1972
 
 # 0.6.17 (25. April, 2023)
 
diff --git a/axum/src/extract/ws.rs b/axum/src/extract/ws.rs
index d785a800..c2c1d279 100644
--- a/axum/src/extract/ws.rs
+++ b/axum/src/extract/ws.rs
@@ -391,8 +391,9 @@ where
 
         let sec_websocket_key = parts
             .headers
-            .remove(header::SEC_WEBSOCKET_KEY)
-            .ok_or(WebSocketKeyHeaderMissing)?;
+            .get(header::SEC_WEBSOCKET_KEY)
+            .ok_or(WebSocketKeyHeaderMissing)?
+            .clone();
 
         let on_upgrade = parts
             .extensions