diff --git a/Telegram/SourceFiles/chat_helpers/stickers_emoji_image_loader.cpp b/Telegram/SourceFiles/chat_helpers/stickers_emoji_image_loader.cpp
index 08a12fc7d..b4fec27de 100644
--- a/Telegram/SourceFiles/chat_helpers/stickers_emoji_image_loader.cpp
+++ b/Telegram/SourceFiles/chat_helpers/stickers_emoji_image_loader.cpp
@@ -68,7 +68,7 @@ QImage EmojiImageLoader::prepare(EmojiPtr emoji) const {
 			{ -1, 1 },
 			{ 1, 1 },
 		} };
-		const auto corrected = int(base::SafeRound(delta / sqrt(2.)));
+		const auto corrected = int(base::SafeRound(delta / M_SQRT2));
 		for (const auto &shift : diagonal) {
 			for (auto i = 0; i != corrected; ++i) {
 				p.drawImage(QPoint(delta, delta) + shift * (i + 1), tinted);
diff --git a/Telegram/SourceFiles/media/player/media_player_button.cpp b/Telegram/SourceFiles/media/player/media_player_button.cpp
index a59e536c5..c646727c0 100644
--- a/Telegram/SourceFiles/media/player/media_player_button.cpp
+++ b/Telegram/SourceFiles/media/player/media_player_button.cpp
@@ -138,8 +138,6 @@ void PlayButtonLayout::paintPlayToPause(QPainter &p, const QBrush &brush, float6
 }
 
 void PlayButtonLayout::paintPlayToCancel(QPainter &p, const QBrush &brush, float64 progress) {
-	static const auto sqrt2 = sqrt(2.);
-
 	auto playLeft = 0. + _st.playPosition.x();
 	auto playTop = 0. + _st.playPosition.y();
 	auto playWidth = _st.playOuter.width() - 2 * playLeft;
@@ -149,7 +147,7 @@ void PlayButtonLayout::paintPlayToCancel(QPainter &p, const QBrush &brush, float
 	auto cancelTop = 0. + _st.cancelPosition.y();
 	auto cancelWidth = _st.cancelOuter.width() - 2 * cancelLeft;
 	auto cancelHeight = _st.cancelOuter.height() - 2 * cancelTop;
-	auto cancelStroke = (0. + _st.cancelStroke) / sqrt2;
+	auto cancelStroke = (0. + _st.cancelStroke) / M_SQRT2;
 
 	p.setPen(Qt::NoPen);
 	PainterHighQualityEnabler hq(p);
@@ -186,8 +184,6 @@ void PlayButtonLayout::paintPlayToCancel(QPainter &p, const QBrush &brush, float
 }
 
 void PlayButtonLayout::paintPauseToCancel(QPainter &p, const QBrush &brush, float64 progress) {
-	static const auto sqrt2 = sqrt(2.);
-
 	auto pauseLeft = 0. + _st.pausePosition.x();
 	auto pauseTop = 0. + _st.pausePosition.y();
 	auto pauseWidth = _st.pauseOuter.width() - 2 * pauseLeft;
@@ -198,7 +194,7 @@ void PlayButtonLayout::paintPauseToCancel(QPainter &p, const QBrush &brush, floa
 	auto cancelTop = 0. + _st.cancelPosition.y();
 	auto cancelWidth = _st.cancelOuter.width() - 2 * cancelLeft;
 	auto cancelHeight = _st.cancelOuter.height() - 2 * cancelTop;
-	auto cancelStroke = (0. + _st.cancelStroke) / sqrt2;
+	auto cancelStroke = (0. + _st.cancelStroke) / M_SQRT2;
 
 	p.setPen(Qt::NoPen);
 	PainterHighQualityEnabler hq(p);
diff --git a/Telegram/SourceFiles/window/window_main_menu.cpp b/Telegram/SourceFiles/window/window_main_menu.cpp
index 1b2cb3838..868d3690b 100644
--- a/Telegram/SourceFiles/window/window_main_menu.cpp
+++ b/Telegram/SourceFiles/window/window_main_menu.cpp
@@ -272,8 +272,7 @@ void MainMenu::ToggleAccountsButton::paintEvent(QPaintEvent *e) {
 	const auto y = 0. + height() - st::mainMenuTogglePosition.y();
 	const auto size = st::mainMenuToggleSize;
 	const auto size2 = size / 2.;
-	const auto sqrt2 = sqrt(2.);
-	const auto stroke = (st::mainMenuToggleFourStrokes / 4.) / sqrt2;
+	const auto stroke = (st::mainMenuToggleFourStrokes / 4.) / M_SQRT2;
 	const auto left = x - size;
 	const auto right = x + size;
 	const auto bottom = y + size2;
diff --git a/Telegram/lib_ui b/Telegram/lib_ui
index 6e3cc8c76..28d01d023 160000
--- a/Telegram/lib_ui
+++ b/Telegram/lib_ui
@@ -1 +1 @@
-Subproject commit 6e3cc8c769fcc424e2e798ca90847bf6d89688d0
+Subproject commit 28d01d023bd76310520a895bdb7f66a2e70a2043