1 files changed, 1 insertions, 1 deletions
diff --git a/Swiften/Serializer/PayloadSerializers/MIXJoinSerializer.cpp b/Swiften/Serializer/PayloadSerializers/MIXJoinSerializer.cpp
index cae15c2..cfb4d31 100644
--- a/Swiften/Serializer/PayloadSerializers/MIXJoinSerializer.cpp
+++ b/Swiften/Serializer/PayloadSerializers/MIXJoinSerializer.cpp
@@ -25,7 +25,7 @@ std::string MIXJoinSerializer::serializePayload(std::shared_ptr<MIXJoin> payload
     if (!payload) {
         return "";
     }
-    XMLElement element("join", "urn:xmpp:mix:1");
+    XMLElement element("join", "urn:xmpp:mix:0");
     if (payload->getChannel()) {
         element.setAttribute("channel", *payload->getChannel());
     }