diff --git a/src/corelib/kernel/qmath.h b/src/corelib/kernel/qmath.h
index 68f6a65c87..305e9065e9 100644
--- a/src/corelib/kernel/qmath.h
+++ b/src/corelib/kernel/qmath.h
@@ -244,16 +244,13 @@ Q_DECL_CONSTEXPR inline double qRadiansToDegrees(double radians)
 }
 
 
-#if defined(QT_HAS_BUILTIN_CLZ)
-inline quint32 qNextPowerOfTwo(quint32 v)
+Q_DECL_RELAXED_CONSTEXPR inline quint32 qNextPowerOfTwo(quint32 v)
 {
+#if defined(QT_HAS_BUILTIN_CLZ)
     if (v == 0)
         return 1;
     return 2U << (31 ^ QAlgorithmsPrivate::qt_builtin_clz(v));
-}
 #else
-inline quint32 qNextPowerOfTwo(quint32 v)
-{
     v |= v >> 1;
     v |= v >> 2;
     v |= v >> 4;
@@ -261,19 +258,16 @@ inline quint32 qNextPowerOfTwo(quint32 v)
     v |= v >> 16;
     ++v;
     return v;
-}
 #endif
+}
 
-#if defined(QT_HAS_BUILTIN_CLZLL)
-inline quint64 qNextPowerOfTwo(quint64 v)
+Q_DECL_RELAXED_CONSTEXPR inline quint64 qNextPowerOfTwo(quint64 v)
 {
+#if defined(QT_HAS_BUILTIN_CLZLL)
     if (v == 0)
         return 1;
     return Q_UINT64_C(2) << (63 ^ QAlgorithmsPrivate::qt_builtin_clzll(v));
-}
 #else
-inline quint64 qNextPowerOfTwo(quint64 v)
-{
     v |= v >> 1;
     v |= v >> 2;
     v |= v >> 4;
@@ -282,15 +276,15 @@ inline quint64 qNextPowerOfTwo(quint64 v)
     v |= v >> 32;
     ++v;
     return v;
-}
 #endif
+}
 
-inline quint32 qNextPowerOfTwo(qint32 v)
+Q_DECL_RELAXED_CONSTEXPR inline quint32 qNextPowerOfTwo(qint32 v)
 {
     return qNextPowerOfTwo(quint32(v));
 }
 
-inline quint64 qNextPowerOfTwo(qint64 v)
+Q_DECL_RELAXED_CONSTEXPR inline quint64 qNextPowerOfTwo(qint64 v)
 {
     return qNextPowerOfTwo(quint64(v));
 }