diff --git a/smack-extensions/src/main/java/org/jivesoftware/smackx/muc/MultiUserChat.java b/smack-extensions/src/main/java/org/jivesoftware/smackx/muc/MultiUserChat.java
index 95bf7e816..d6f24b72f 100644
--- a/smack-extensions/src/main/java/org/jivesoftware/smackx/muc/MultiUserChat.java
+++ b/smack-extensions/src/main/java/org/jivesoftware/smackx/muc/MultiUserChat.java
@@ -295,7 +295,6 @@ public class MultiUserChat {
      */
     private Presence enter(MucEnterConfiguration conf) throws NotConnectedException, NoResponseException,
                     XMPPErrorException, InterruptedException, NotAMucServiceException {
-        StringUtils.requireNotNullOrEmpty(nickname, "Nickname must not be null or blank.");
         final DomainBareJid mucService = room.asDomainBareJid();
         if (!KNOWN_MUC_SERVICES.containsKey(mucService)) {
             if (multiUserChatManager.providesMucService(mucService)) {