diff --git a/src/main/java/eu/siacs/conversations/parser/PresenceParser.java b/src/main/java/eu/siacs/conversations/parser/PresenceParser.java
index 635f29327..8b3679707 100644
--- a/src/main/java/eu/siacs/conversations/parser/PresenceParser.java
+++ b/src/main/java/eu/siacs/conversations/parser/PresenceParser.java
@@ -4,6 +4,7 @@ import eu.siacs.conversations.crypto.PgpEngine;
 import eu.siacs.conversations.entities.Account;
 import eu.siacs.conversations.entities.Contact;
 import eu.siacs.conversations.entities.Conversation;
+import eu.siacs.conversations.entities.MucOptions;
 import eu.siacs.conversations.entities.Presences;
 import eu.siacs.conversations.generator.PresenceGenerator;
 import eu.siacs.conversations.services.XmppConnectionService;
@@ -34,15 +35,17 @@ public class PresenceParser extends AbstractParser implements
 				mXmppConnectionService.getAvatarService().clear(muc);
 			}
 		} else if (packet.hasChild("x", "http://jabber.org/protocol/muc")) {
-			final Conversation muc = mXmppConnectionService.find(account,
+			final Conversation conversation = mXmppConnectionService.find(account,
                     packet.getFrom().toBareJid());
-			if (muc != null) {
-				boolean before = muc.getMucOptions().online();
-				muc.getMucOptions().processPacket(packet, mPgpEngine);
-				if (before != muc.getMucOptions().online()) {
+			if (conversation != null) {
+				final MucOptions mucOptions = conversation.getMucOptions();
+				boolean before = mucOptions.online();
+				int count = mucOptions.getUsers().size();
+				mucOptions.processPacket(packet, mPgpEngine);
+				mXmppConnectionService.getAvatarService().clear(conversation);
+				if (before != mucOptions.online() || (mucOptions.online() && count != mucOptions.getUsers().size())) {
 					mXmppConnectionService.updateConversationUi();
 				}
-				mXmppConnectionService.getAvatarService().clear(muc);
 			}
 		}
 	}