diff -r 1a4342d80de7 -r 654661eab7f3 src/widgets/matrixeditor.cpp
--- a/src/widgets/matrixeditor.cpp	Wed Jun 08 20:41:21 2022 +0300
+++ b/src/widgets/matrixeditor.cpp	Wed Jun 08 22:29:44 2022 +0300
@@ -1,4 +1,4 @@
-#include "main.h"
+#include "basics.h"
 #include "matrixeditor.h"
 #include "ui_matrixeditor.h"
 #include "../ui/multiplyfactordialog.h"
@@ -14,7 +14,7 @@
 	{
 		for (int row = 0; row < countof(this->spinboxes[0]); row += 1)
 		{
-			const QString name = "cell"_q + QString::number(column) + QString::number(row);
+			const QString name = QStringLiteral("cell%1%2").arg(column).arg(row);
 			QDoubleSpinBox** spinbox = &this->spinboxes[column][row];
 			*spinbox = this->findChild<QDoubleSpinBox*>(name);
 			connect(*spinbox, qOverload<double>(&QDoubleSpinBox::valueChanged), [&]()
@@ -23,7 +23,8 @@
 			});
 			Q_ASSERT(*spinbox != nullptr);
 		}
-		QAbstractButton* button = this->findChild<QAbstractButton*>("multiply"_q + QString::number(column));
+		const QString multiplyButtonName = QStringLiteral("multiply%1").arg(column);
+		QAbstractButton* button = this->findChild<QAbstractButton*>(multiplyButtonName);
 		button->setProperty(BUTTON_COLUMN_PROPERTY, column);
 		connect(button, &QAbstractButton::clicked, this, &MatrixEditor::multiplyButtonPressed);
 	}