diff --git a/Telegram/SourceFiles/boxes/confirmbox.cpp b/Telegram/SourceFiles/boxes/confirmbox.cpp
index b836cbbb7..2f350119b 100644
--- a/Telegram/SourceFiles/boxes/confirmbox.cpp
+++ b/Telegram/SourceFiles/boxes/confirmbox.cpp
@@ -403,7 +403,7 @@ void PinMessageBox::onPin() {
 	if (_requestId) return;
 
 	MTPchannels_UpdatePinnedMessage::Flags flags = 0;
-	if (_notify.checked()) {
+	if (!_notify.checked()) {
 		flags |= MTPchannels_UpdatePinnedMessage::Flag::f_silent;
 	}
 	_requestId = MTP::send(MTPchannels_UpdatePinnedMessage(MTP_flags(flags), _channel->inputChannel, MTP_int(_msgId)), rpcDone(&PinMessageBox::pinDone), rpcFail(&PinMessageBox::pinFail));