diff --git a/src/main/java/eu/siacs/conversations/utils/Xmlns.java b/src/main/java/eu/siacs/conversations/utils/Xmlns.java
index 4edd8805..379ba4e5 100644
--- a/src/main/java/eu/siacs/conversations/utils/Xmlns.java
+++ b/src/main/java/eu/siacs/conversations/utils/Xmlns.java
@@ -7,6 +7,6 @@ public final class Xmlns {
 	public static final String BYTE_STREAMS = "http://jabber.org/protocol/bytestreams";
 	public static final String HTTP_UPLOAD = "urn:xmpp:http:upload";
 	public static final String STANZA_IDS = "urn:xmpp:sid:0";
-	public static final String MAM = "urn:xmpp:mam:1";
+	public static final String MAM = "urn:xmpp:mam:2";
 	public static final String MAM_LEGACY = "urn:xmpp:mam:0";
 }