diff --git a/Telegram/SourceFiles/data/data_peer.cpp b/Telegram/SourceFiles/data/data_peer.cpp
index 9422f711d..01fe66a84 100644
--- a/Telegram/SourceFiles/data/data_peer.cpp
+++ b/Telegram/SourceFiles/data/data_peer.cpp
@@ -903,7 +903,9 @@ bool PeerData::canRevokeFullHistory() const {
 	} else if (const auto chat = asChat()) {
 		return chat->amCreator();
 	} else if (const auto megagroup = asMegagroup()) {
-		return megagroup->amCreator();
+		return megagroup->amCreator()
+			&& megagroup->membersCountKnown()
+			&& megagroup->canDelete();
 	}
 	return false;
 }