diff --git a/Telegram/SourceFiles/core/application.cpp b/Telegram/SourceFiles/core/application.cpp
index 9e576f2889..3992469730 100644
--- a/Telegram/SourceFiles/core/application.cpp
+++ b/Telegram/SourceFiles/core/application.cpp
@@ -683,7 +683,8 @@ bool Application::eventFilter(QObject *object, QEvent *e) {
 	} break;
 
 	case QEvent::ThemeChange: {
-		if (Platform::IsLinux() && object == QGuiApplication::allWindows().first()) {
+		if (Platform::IsLinux()
+				&& object == QGuiApplication::allWindows().constFirst()) {
 			Core::App().refreshApplicationIcon();
 			Core::App().tray().updateIconCounters();
 		}
diff --git a/Telegram/SourceFiles/inline_bots/inline_bot_layout_item.cpp b/Telegram/SourceFiles/inline_bots/inline_bot_layout_item.cpp
index d1d1cafade..2f5242e85a 100644
--- a/Telegram/SourceFiles/inline_bots/inline_bot_layout_item.cpp
+++ b/Telegram/SourceFiles/inline_bots/inline_bot_layout_item.cpp
@@ -213,7 +213,7 @@ QString ItemBase::getResultThumbLetter() const {
 			domain = parts.at(2);
 		}
 
-		parts = domain.split('@').back().split('.');
+		parts = domain.split('@').constLast().split('.');
 		if (parts.size() > 1) {
 			return parts.at(parts.size() - 2).at(0).toUpper();
 		}
diff --git a/Telegram/SourceFiles/overview/overview_layout.cpp b/Telegram/SourceFiles/overview/overview_layout.cpp
index 26413eb002..a7eee4c195 100644
--- a/Telegram/SourceFiles/overview/overview_layout.cpp
+++ b/Telegram/SourceFiles/overview/overview_layout.cpp
@@ -1693,7 +1693,7 @@ Link::Link(
 			domain = parts.at(2);
 		}
 
-		parts = domain.split('@').back().split('.', Qt::SkipEmptyParts);
+		parts = domain.split('@').constLast().split('.', Qt::SkipEmptyParts);
 		if (parts.size() > 1) {
 			_letter = parts.at(parts.size() - 2).at(0).toUpper();
 			if (_title.isEmpty()) {