diff --git a/external/java_websocket/patches/ant-build.patch b/external/java_websocket/patches/ant-build.patch
index 6f86c530ca0d..c2546bcc1f1e 100644
--- a/external/java_websocket/patches/ant-build.patch
+++ b/external/java_websocket/patches/ant-build.patch
@@ -1,6 +1,6 @@
 --- /dev/null	1970-01-01 01:00:00.000000000 +0100
 +++ b/build.xml	2023-08-30 11:43:05.152647141 +0100
-@@ -0,0 +1,23 @@
+@@ -0,0 +1,24 @@
 +<project default="all">
 +    <target name="all" depends="jar" />
 +
@@ -8,6 +8,7 @@
 +        <mkdir dir="build/classes" />
 +        <javac includeantruntime="false" srcdir="src/main/java"
 +               destdir="build/classes" encoding="UTF-8">
++            <exclude name="**/PerMessageDeflateExtension.java"/>
 +        </javac>
 +    </target>
 +