diff --git a/src/core/utilities.cpp b/src/core/utilities.cpp
index 794178bb1..72c11aad3 100644
--- a/src/core/utilities.cpp
+++ b/src/core/utilities.cpp
@@ -215,7 +215,12 @@ quint64 FileSystemCapacity(const QString &path) {
     return quint64(fs_info.f_blocks) * quint64(fs_info.f_bsize);
 #elif defined(Q_OS_WIN32)
   _ULARGE_INTEGER ret;
-  if (GetDiskFreeSpaceEx(QDir::toNativeSeparators(path).toLocal8Bit().constData(), nullptr,&ret, nullptr) != 0)
+#  if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+  ScopedWCharArray wchar(QDir::toNativeSeparators(path));
+  if (GetDiskFreeSpaceEx(wchar.get(), nullptr, &ret, nullptr) != 0)
+#  else
+  if (GetDiskFreeSpaceEx(QDir::toNativeSeparators(path).toLocal8Bit().constData(), nullptr, &ret, nullptr) != 0)
+#  endif
     return ret.QuadPart;
 #endif
 
@@ -231,7 +236,12 @@ quint64 FileSystemFreeSpace(const QString &path) {
     return quint64(fs_info.f_bavail) * quint64(fs_info.f_bsize);
 #elif defined(Q_OS_WIN32)
   _ULARGE_INTEGER ret;
+#  if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+  ScopedWCharArray wchar(QDir::toNativeSeparators(path));
+  if (GetDiskFreeSpaceEx(wchar.get(), &ret, nullptr, nullptr) != 0)
+#  else
   if (GetDiskFreeSpaceEx(QDir::toNativeSeparators(path).toLocal8Bit().constData(), &ret, nullptr, nullptr) != 0)
+#  endif
     return ret.QuadPart;
 #endif