diff --git a/src/Gui/QSint/actionpanel/actionlabel.cpp b/src/Gui/QSint/actionpanel/actionlabel.cpp
index 3a548e0403..35619027d0 100644
--- a/src/Gui/QSint/actionpanel/actionlabel.cpp
+++ b/src/Gui/QSint/actionpanel/actionlabel.cpp
@@ -43,9 +43,9 @@ QSize ActionLabel::sizeHint() const
     QStyleOptionToolButton opt;
     initStyleOption(&opt);
 
-    QString s = text().isEmpty() ? QString::fromLatin1("XXXX") : text();
+    QString s = text().isEmpty() ? QStringLiteral("XXXX") : text();
     QSize textSize = fontMetrics().size(Qt::TextShowMnemonic, s);
-    const int padding = 10;
+    constexpr int padding = 10;
 
     int width = textSize.width();
     if (!icon().isNull()) {
diff --git a/src/Gui/QSint/actionpanel/actionpanelscheme.cpp b/src/Gui/QSint/actionpanel/actionpanelscheme.cpp
index 6eecbbb9af..d250f9a0b5 100644
--- a/src/Gui/QSint/actionpanel/actionpanelscheme.cpp
+++ b/src/Gui/QSint/actionpanel/actionpanelscheme.cpp
@@ -12,7 +12,7 @@ namespace QSint
 {
 
 
-const QString ActionPanelScheme::minimumStyle = QString::fromLatin1(
+constexpr QString ActionPanelScheme::minimumStyle = QStringLiteral(
     "QSint--ActionGroup QFrame[class='header'] {"
         "border: none;"
     "}"
@@ -49,7 +49,7 @@ QString ActionPanelScheme::systemStyle(const QPalette& p)
     replacements["headerBackground"] = headerBackground.name();
     replacements["groupBackground"] = groupBackground.name();;
 
-    QString style = QString::fromLatin1(
+    QString style = QStringLiteral(
         "QSint--ActionGroup QFrame[class='header'] {"
             "background-color: {headerBackground};"
         "}"