diff --git a/Telegram/SourceFiles/boxes/edit_caption_box.cpp b/Telegram/SourceFiles/boxes/edit_caption_box.cpp
index 4cd2a35f7..253d42213 100644
--- a/Telegram/SourceFiles/boxes/edit_caption_box.cpp
+++ b/Telegram/SourceFiles/boxes/edit_caption_box.cpp
@@ -67,6 +67,8 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 
 namespace {
 
+constexpr auto kChangesDebounceTimeout = crl::time(1000);
+
 auto ListFromMimeData(not_null<const QMimeData*> data, bool premium) {
 	using Error = Ui::PreparedList::Error;
 	const auto list = Core::ReadMimeUrls(data);
@@ -288,12 +290,23 @@ void EditCaptionBox::setupField() {
 }
 
 void EditCaptionBox::setInitialText() {
+	const auto initial = PrepareEditText(_historyItem);
 	_field->setTextWithTags(
-		PrepareEditText(_historyItem),
+		initial,
 		Ui::InputField::HistoryAction::Clear);
 	auto cursor = _field->textCursor();
 	cursor.movePosition(QTextCursor::End);
 	_field->setTextCursor(cursor);
+
+	_checkChangedTimer.setCallback([=] {
+		if (_field->getTextWithAppliedMarkdown() == initial) {
+			setCloseByOutsideClick(true);
+		}
+	});
+	connect(_field, &Ui::InputField::changed, [=] {
+		_checkChangedTimer.callOnce(kChangesDebounceTimeout);
+		setCloseByOutsideClick(false);
+	});
 }
 
 void EditCaptionBox::setupControls() {
diff --git a/Telegram/SourceFiles/boxes/edit_caption_box.h b/Telegram/SourceFiles/boxes/edit_caption_box.h
index 5a5910f9a..deb756b50 100644
--- a/Telegram/SourceFiles/boxes/edit_caption_box.h
+++ b/Telegram/SourceFiles/boxes/edit_caption_box.h
@@ -95,6 +95,7 @@ private:
 
 	mtpRequestId _saveRequestId = 0;
 
+	base::Timer _checkChangedTimer;
 	bool _isPhoto = false;
 	bool _asFile = false;