diff --git a/src/corelib/kernel/qmath.h b/src/corelib/kernel/qmath.h
index b1e5b4f17e4..72057ee16d7 100644
--- a/src/corelib/kernel/qmath.h
+++ b/src/corelib/kernel/qmath.h
@@ -370,6 +370,16 @@ constexpr inline quint64 qNextPowerOfTwo(qint64 v)
     return qNextPowerOfTwo(quint64(v));
 }
 
+constexpr inline unsigned long qNextPowerOfTwo(unsigned long v)
+{
+    return qNextPowerOfTwo(QIntegerForSizeof<long>::Unsigned(v));
+}
+
+constexpr inline unsigned long qNextPowerOfTwo(long v)
+{
+    return qNextPowerOfTwo(QIntegerForSizeof<long>::Unsigned(v));
+}
+
 QT_END_NAMESPACE
 
 #endif // QMATH_H
diff --git a/src/corelib/tools/qhash.h b/src/corelib/tools/qhash.h
index eedb594e265..b6a12a721e9 100644
--- a/src/corelib/tools/qhash.h
+++ b/src/corelib/tools/qhash.h
@@ -435,7 +435,7 @@ inline constexpr size_t bucketsForCapacity(size_t requestedCapacity) noexcept
         return SpanConstants::NEntries;
     if (requestedCapacity >= maxNumBuckets())
         return maxNumBuckets();
-    return qNextPowerOfTwo(QIntegerForSize<sizeof(size_t)>::Unsigned(2 * requestedCapacity - 1));
+    return qNextPowerOfTwo(2 * requestedCapacity - 1);
 }
 inline constexpr size_t bucketForHash(size_t nBuckets, size_t hash) noexcept
 {