diff --git a/src/libs/qmleditorwidgets/colorbox.cpp b/src/libs/qmleditorwidgets/colorbox.cpp
index ad8109c27d8..b0da2642e26 100644
--- a/src/libs/qmleditorwidgets/colorbox.cpp
+++ b/src/libs/qmleditorwidgets/colorbox.cpp
@@ -29,12 +29,10 @@
 
 static inline QString properName(const QColor &color)
 {
-    QString s;
     if (color.alpha() == 255)
-        s.sprintf("#%02x%02x%02x", color.red(), color.green(), color.blue());
+        return QString::asprintf("#%02x%02x%02x", color.red(), color.green(), color.blue());
     else
-        s.sprintf("#%02x%02x%02x%02x", color.alpha(), color.red(), color.green(), color.blue());
-    return s;
+        return QString::asprintf("#%02x%02x%02x%02x", color.alpha(), color.red(), color.green(), color.blue());
 }
 
 static inline QColor properColor(const QString &str)
diff --git a/src/plugins/cppeditor/cppquickfixes.cpp b/src/plugins/cppeditor/cppquickfixes.cpp
index bec9f419e6d..538c9242b8d 100644
--- a/src/plugins/cppeditor/cppquickfixes.cpp
+++ b/src/plugins/cppeditor/cppquickfixes.cpp
@@ -1510,8 +1510,7 @@ void ConvertNumericLiteral::match(const CppQuickFixInterface &interface, QuickFi
             0x20
 
         */
-        QString replacement;
-        replacement.sprintf("0x%lX", value);
+        const QString replacement = QString::asprintf("0x%lX", value);
         auto op = new ConvertNumericLiteralOp(interface, start, start + numberLength, replacement);
         op->setDescription(QApplication::translate("CppTools::QuickFix", "Convert to Hexadecimal"));
         op->setPriority(priority);
@@ -1528,8 +1527,7 @@ void ConvertNumericLiteral::match(const CppQuickFixInterface &interface, QuickFi
           With
             040
         */
-        QString replacement;
-        replacement.sprintf("0%lo", value);
+        const QString replacement = QString::asprintf("0%lo", value);
         auto op = new ConvertNumericLiteralOp(interface, start, start + numberLength, replacement);
         op->setDescription(QApplication::translate("CppTools::QuickFix", "Convert to Octal"));
         op->setPriority(priority);
@@ -1546,8 +1544,7 @@ void ConvertNumericLiteral::match(const CppQuickFixInterface &interface, QuickFi
            With
             32
         */
-        QString replacement;
-        replacement.sprintf("%lu", value);
+        const QString replacement = QString::asprintf("%lu", value);
         auto op = new ConvertNumericLiteralOp(interface, start, start + numberLength, replacement);
         op->setDescription(QApplication::translate("CppTools::QuickFix", "Convert to Decimal"));
         op->setPriority(priority);
diff --git a/src/plugins/qmldesigner/designercore/model/qmltextgenerator.cpp b/src/plugins/qmldesigner/designercore/model/qmltextgenerator.cpp
index 08105bf2be3..8ab244fe2ba 100644
--- a/src/plugins/qmldesigner/designercore/model/qmltextgenerator.cpp
+++ b/src/plugins/qmldesigner/designercore/model/qmltextgenerator.cpp
@@ -41,12 +41,10 @@ using namespace QmlDesigner::Internal;
 
 inline static QString properColorName(const QColor &color)
 {
-    QString s;
     if (color.alpha() == 255)
-        s.sprintf("#%02x%02x%02x", color.red(), color.green(), color.blue());
+        return QString::asprintf("#%02x%02x%02x", color.red(), color.green(), color.blue());
     else
-        s.sprintf("#%02x%02x%02x%02x", color.alpha(), color.red(), color.green(), color.blue());
-    return s;
+        return QString::asprintf("#%02x%02x%02x%02x", color.alpha(), color.red(), color.green(), color.blue());
 }
 
 inline static QString doubleToString(double d)
diff --git a/src/shared/proparser/qmakebuiltins.cpp b/src/shared/proparser/qmakebuiltins.cpp
index ea7e308cc50..916d4ab891a 100644
--- a/src/shared/proparser/qmakebuiltins.cpp
+++ b/src/shared/proparser/qmakebuiltins.cpp
@@ -877,8 +877,7 @@ QMakeEvaluator::VisitReturn QMakeEvaluator::evaluateBuiltinExpand(
             ret += values(map(args.at(0)));
         break;
     case E_LIST: {
-        QString tmp;
-        tmp.sprintf(".QMAKE_INTERNAL_TMP_variableName_%d", m_listCount++);
+        const QString tmp = QString::asprintf(".QMAKE_INTERNAL_TMP_variableName_%d", m_listCount++);
         ret = ProStringList(ProString(tmp));
         ProStringList lst;
         for (const ProString &arg : args)