diff --git a/src/kconfig_compiler/kconfig_compiler.cpp b/src/kconfig_compiler/kconfig_compiler.cpp
--- a/src/kconfig_compiler/kconfig_compiler.cpp
+++ b/src/kconfig_compiler/kconfig_compiler.cpp
@@ -176,12 +176,7 @@
 
 QString literalString(const QString &s)
 {
-    bool isAscii = true;
-    for (int i = s.length(); i--;)
-        if (s[i].unicode() > 127) {
-            isAscii = false;
-        }
-
+    bool isAscii = ! std::any_of(std::begin(s), std::end(s), [](QChar a) { return a.unicode() > 127; });
     if (isAscii) {
         return QLatin1String("QStringLiteral( ") + quoteString(s) + QLatin1String(" )");
     } else {