diff --git a/src/murmur/Messages.cpp b/src/murmur/Messages.cpp
index 0f2265df7..0d7a5edf8 100644
--- a/src/murmur/Messages.cpp
+++ b/src/murmur/Messages.cpp
@@ -507,6 +507,10 @@ void Server::msgUserState(ServerUser *uSource, MumbleProto::UserState &msg) {
 			PERM_DENIED_TYPE(SuperUser);
 			return;
 		}
+		if (uSource->cChannel->bTemporary) {
+			PERM_DENIED_TYPE(TemporaryChannel);
+			return;
+		}
 		if (! hasPermission(uSource, pDstServerUser->cChannel, ChanACL::MuteDeafen) || msg.suppress()) {
 			PERM_DENIED(uSource, pDstServerUser->cChannel, ChanACL::MuteDeafen);
 			return;