diff --git a/Telegram/SourceFiles/ui/twidget.cpp b/Telegram/SourceFiles/ui/twidget.cpp
index d9b57cb3b..0ccc63ed5 100644
--- a/Telegram/SourceFiles/ui/twidget.cpp
+++ b/Telegram/SourceFiles/ui/twidget.cpp
@@ -91,8 +91,11 @@ void Start() {
 			LOG(("Fonts Info: Using Segoe UI Semibold instead of Open Sans Semibold."));
 		}
 	}
-	QFont::insertSubstitution(qsl("Open Sans"), qsl("Segoe UI"));
-	QFont::insertSubstitution(qsl("Open Sans Semibold"), qsl("Segoe UI Semibold"));
+	// Disable default fallbacks to Segoe UI, see:
+	// https://github.com/telegramdesktop/tdesktop/issues/5368
+	//
+	//QFont::insertSubstitution(qsl("Open Sans"), qsl("Segoe UI"));
+	//QFont::insertSubstitution(qsl("Open Sans Semibold"), qsl("Segoe UI Semibold"));
 #elif defined Q_OS_MAC // Q_OS_WIN
 	auto list = QStringList();
 	list.append(qsl(".SF NS Text"));