diff --git a/spring-websocket/src/main/java/org/springframework/web/socket/sockjs/transport/TransportHandlingSockJsService.java b/spring-websocket/src/main/java/org/springframework/web/socket/sockjs/transport/TransportHandlingSockJsService.java
index c8050b519c..a033d7d611 100644
--- a/spring-websocket/src/main/java/org/springframework/web/socket/sockjs/transport/TransportHandlingSockJsService.java
+++ b/spring-websocket/src/main/java/org/springframework/web/socket/sockjs/transport/TransportHandlingSockJsService.java
@@ -146,7 +146,7 @@ public class TransportHandlingSockJsService extends AbstractSockJsService implem
 	 * Return the configured WebSocket handshake request interceptors.
 	 */
 	public List<HandshakeInterceptor> getHandshakeInterceptors() {
-		return Collections.unmodifiableList(this.interceptors);
+		return this.interceptors;
 	}