diff --git a/src/corelib/global/qttypetraits.h b/src/corelib/global/qttypetraits.h
index 49f2728e9f..9129f536aa 100644
--- a/src/corelib/global/qttypetraits.h
+++ b/src/corelib/global/qttypetraits.h
@@ -17,6 +17,23 @@
 
 QT_BEGIN_NAMESPACE
 
+// like std::is_constant_evaluated
+#define QT_SUPPORTS_IS_CONSTANT_EVALUATED
+#ifdef __cpp_lib_is_constant_evaluated
+constexpr bool qIsConstantEvaluated() noexcept
+{
+    return std::is_constant_evaluated();
+}
+#elif __has_builtin(__builtin_is_constant_evaluated) || \
+    (defined(Q_CC_MSVC_ONLY) /* >= 1925, but we require 1927 in qglobal.h */)
+constexpr bool qIsConstantEvaluated() noexcept
+{
+    return __builtin_is_constant_evaluated();
+}
+#else
+#  undef QT_SUPPORTS_IS_CONSTANT_EVALUATED
+#endif
+
 // like std::to_underlying
 template <typename Enum>
 constexpr std::underlying_type_t<Enum> qToUnderlying(Enum e) noexcept
diff --git a/src/corelib/text/qanystringview.h b/src/corelib/text/qanystringview.h
index c2a4b9ad09..ac5cb54c78 100644
--- a/src/corelib/text/qanystringview.h
+++ b/src/corelib/text/qanystringview.h
@@ -101,12 +101,12 @@ private:
     static constexpr bool isAsciiOnlyCharsAtCompileTime(Char *str, qsizetype sz) noexcept
     {
         // do not perform check if not at compile time
-#if !defined(__cpp_lib_is_constant_evaluated)
+#if !defined(QT_SUPPORTS_IS_CONSTANT_EVALUATED)
         Q_UNUSED(str);
         Q_UNUSED(sz);
         return false;
 #else
-        if (!std::is_constant_evaluated())
+        if (!qIsConstantEvaluated())
             return false;
         if constexpr (sizeof(Char) != sizeof(char)) {
             Q_UNUSED(str);
@@ -137,8 +137,8 @@ private:
     template <typename Char>
     static constexpr qsizetype lengthHelperPointer(const Char *str) noexcept
     {
-#ifdef __cpp_lib_is_constant_evaluated
-        if (std::is_constant_evaluated())
+#ifdef QT_SUPPORTS_IS_CONSTANT_EVALUATED
+        if (qIsConstantEvaluated())
             return qsizetype(std::char_traits<Char>::length(str));
 #endif
         if constexpr (sizeof(Char) == sizeof(char16_t))
@@ -289,13 +289,6 @@ public:
     [[nodiscard]] Q_CORE_EXPORT static int compare(QAnyStringView lhs, QAnyStringView rhs, Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept;
     [[nodiscard]] Q_CORE_EXPORT static bool equal(QAnyStringView lhs, QAnyStringView rhs) noexcept;
 
-    static constexpr inline bool detects_US_ASCII_at_compile_time =
-#ifdef __cpp_lib_is_constant_evaluated
-            true
-#else
-            false
-#endif
-            ;
     //
     // STL compatibility API:
     //
diff --git a/src/corelib/text/qstringview.h b/src/corelib/text/qstringview.h
index 24a860c1a6..e4c0c4dd8d 100644
--- a/src/corelib/text/qstringview.h
+++ b/src/corelib/text/qstringview.h
@@ -105,8 +105,8 @@ private:
     template <typename Char>
     static constexpr qsizetype lengthHelperPointer(const Char *str) noexcept
     {
-#if defined(__cpp_lib_is_constant_evaluated)
-        if (std::is_constant_evaluated())
+#if defined(QT_SUPPORTS_IS_CONSTANT_EVALUATED)
+        if (qIsConstantEvaluated())
             return std::char_traits<Char>::length(str);
 #endif
         return QtPrivate::qustrlen(reinterpret_cast<const char16_t *>(str));
diff --git a/tests/auto/corelib/text/qanystringview/tst_qanystringview.cpp b/tests/auto/corelib/text/qanystringview/tst_qanystringview.cpp
index d5a62887e1..fa55bf5db2 100644
--- a/tests/auto/corelib/text/qanystringview/tst_qanystringview.cpp
+++ b/tests/auto/corelib/text/qanystringview/tst_qanystringview.cpp
@@ -449,7 +449,8 @@ void tst_QAnyStringView::basics() const
 
 void tst_QAnyStringView::asciiLiteralIsLatin1() const
 {
-    if constexpr (QAnyStringView::detects_US_ASCII_at_compile_time) {
+#ifdef QT_SUPPORTS_IS_CONSTANT_EVALUATED
+    if constexpr (true) {
         constexpr bool asciiCstringIsLatin1 = QAnyStringView("Hello, World").isLatin1();
         QVERIFY(asciiCstringIsLatin1);
         constexpr bool asciiUtf8stringIsLatin1 = QAnyStringView(u8"Hello, World").isLatin1();
@@ -466,6 +467,9 @@ void tst_QAnyStringView::asciiLiteralIsLatin1() const
                 !QAnyStringView::fromArray(u8"Tørrfisk").isLatin1();
         QVERIFY(utf8StringArrayIsNotLatin1);
     }
+#else
+    QSKIP("Compile-detection of US-ASCII strings not possible with this compiler");
+#endif
 }
 
 template <typename StringBuilder>