diff --git a/src/corelib/io/qfsfileengine_p.h b/src/corelib/io/qfsfileengine_p.h
index 8ad673bf0bf..9a54b7554b0 100644
--- a/src/corelib/io/qfsfileengine_p.h
+++ b/src/corelib/io/qfsfileengine_p.h
@@ -215,6 +215,41 @@ class Q_AUTOTEST_EXPORT QFSFileEnginePrivate : public QAbstractFileEnginePrivate
         // ReadOnly by itself never creates.
         return (openMode & QFile::WriteOnly) && !(openMode & QFile::ExistingOnly);
     }
+
+#if defined(Q_OS_UNIX)
+    /*!
+        \internal
+
+        Returns the stdio open flags corresponding to a QIODevice::OpenMode.
+    */
+    static int openModeToOpenFlags(QIODevice::OpenMode mode)
+    {
+        int oflags = QT_OPEN_RDONLY;
+#  ifdef QT_LARGEFILE_SUPPORT
+        oflags |= QT_OPEN_LARGEFILE;
+#  endif
+
+        if ((mode & QIODevice::ReadWrite) == QIODevice::ReadWrite)
+            oflags = QT_OPEN_RDWR;
+        else if (mode & QIODevice::WriteOnly)
+            oflags = QT_OPEN_WRONLY;
+
+        if (openModeCanCreate(mode))
+            oflags |= QT_OPEN_CREAT;
+
+        if (mode & QIODevice::Truncate)
+            oflags |= QT_OPEN_TRUNC;
+
+        if (mode & QIODevice::Append)
+            oflags |= QT_OPEN_APPEND;
+
+        if (mode & QIODevice::NewOnly)
+            oflags |= QT_OPEN_EXCL;
+
+        return oflags;
+    }
+#endif // Q_OS_UNIX
+
 protected:
     QFSFileEnginePrivate(QAbstractFileEngine *q);
 
diff --git a/src/corelib/io/qfsfileengine_unix.cpp b/src/corelib/io/qfsfileengine_unix.cpp
index abf5a0c7db4..0f292998161 100644
--- a/src/corelib/io/qfsfileengine_unix.cpp
+++ b/src/corelib/io/qfsfileengine_unix.cpp
@@ -28,38 +28,6 @@
 
 QT_BEGIN_NAMESPACE
 
-/*!
-    \internal
-
-    Returns the stdio open flags corresponding to a QIODevice::OpenMode.
-*/
-static inline int openModeToOpenFlags(QIODevice::OpenMode mode)
-{
-    int oflags = QT_OPEN_RDONLY;
-#ifdef QT_LARGEFILE_SUPPORT
-    oflags |= QT_OPEN_LARGEFILE;
-#endif
-
-    if ((mode & QFile::ReadWrite) == QFile::ReadWrite)
-        oflags = QT_OPEN_RDWR;
-    else if (mode & QFile::WriteOnly)
-        oflags = QT_OPEN_WRONLY;
-
-    if (QFSFileEnginePrivate::openModeCanCreate(mode))
-        oflags |= QT_OPEN_CREAT;
-
-    if (mode & QFile::Truncate)
-        oflags |= QT_OPEN_TRUNC;
-
-    if (mode & QFile::Append)
-        oflags |= QT_OPEN_APPEND;
-
-    if (mode & QFile::NewOnly)
-        oflags |= QT_OPEN_EXCL;
-
-    return oflags;
-}
-
 static inline QString msgOpenDirectory()
 {
     const char message[] = QT_TRANSLATE_NOOP("QIODevice", "file to open is a directory");
diff --git a/src/corelib/io/qioring_linux.cpp b/src/corelib/io/qioring_linux.cpp
index a28dbb7fc50..ad758007a97 100644
--- a/src/corelib/io/qioring_linux.cpp
+++ b/src/corelib/io/qioring_linux.cpp
@@ -10,6 +10,7 @@ QT_REQUIRE_CONFIG(liburing);
 #include <QtCore/qscopedvaluerollback.h>
 #include <QtCore/private/qcore_unix_p.h>
 #include <QtCore/private/qfiledevice_p.h>
+#include <QtCore/private/qfsfileengine_p.h>
 
 #include <liburing.h>
 #include <sys/mman.h>
@@ -459,35 +460,6 @@ static void prepareFileReadWrite(io_uring_sqe *sqe, const QIORingRequestOffsetFd
     sqe->addr = quint64(address);
 }
 
-// @todo: stolen from qfsfileengine_unix.cpp
-static inline int openModeToOpenFlags(QIODevice::OpenMode mode)
-{
-    int oflags = QT_OPEN_RDONLY;
-#ifdef QT_LARGEFILE_SUPPORT
-    oflags |= QT_OPEN_LARGEFILE;
-#endif
-
-    if ((mode & QIODevice::ReadWrite) == QIODevice::ReadWrite)
-        oflags = QT_OPEN_RDWR;
-    else if (mode & QIODevice::WriteOnly)
-        oflags = QT_OPEN_WRONLY;
-
-    if ((mode & QIODevice::WriteOnly)
-        && !(mode & QIODevice::ExistingOnly)) // QFSFileEnginePrivate::openModeCanCreate(mode))
-        oflags |= QT_OPEN_CREAT;
-
-    if (mode & QIODevice::Truncate)
-        oflags |= QT_OPEN_TRUNC;
-
-    if (mode & QIODevice::Append)
-        oflags |= QT_OPEN_APPEND;
-
-    if (mode & QIODevice::NewOnly)
-        oflags |= QT_OPEN_EXCL;
-
-    return oflags;
-}
-
 /*!
     \internal
     Because vectored operations are also affected by the maximum size
@@ -598,7 +570,7 @@ auto QIORing::prepareRequest(io_uring_sqe *sqe, GenericRequestType &request) ->
                 *openRequest = request.template requestData<Operation::Open>();
         sqe->fd = AT_FDCWD; // Could also support proper openat semantics
         sqe->addr = reinterpret_cast<quint64>(openRequest->path.native().c_str());
-        sqe->open_flags = openModeToOpenFlags(openRequest->flags);
+        sqe->open_flags = QFSFileEnginePrivate::openModeToOpenFlags(openRequest->flags);
         auto &mode = sqe->len;
         mode = 0666; // With an explicit API we can use QtPrivate::toMode_t() for this
         break;
diff --git a/src/corelib/io/qrandomaccessasyncfile_darwin.mm b/src/corelib/io/qrandomaccessasyncfile_darwin.mm
index 80c1affa642..8d1cf465b73 100644
--- a/src/corelib/io/qrandomaccessasyncfile_darwin.mm
+++ b/src/corelib/io/qrandomaccessasyncfile_darwin.mm
@@ -540,29 +540,6 @@ static bool isBarrierOperation(QIOOperation::Type type)
     });
 }
 
-// stolen from qfsfileengine_unix.cpp
-static inline int openModeToOpenFlags(QIODevice::OpenMode mode)
-{
-    int oflags = QT_OPEN_RDONLY;
-#ifdef QT_LARGEFILE_SUPPORT
-    oflags |= QT_OPEN_LARGEFILE;
-#endif
-    if ((mode & QIODevice::ReadWrite) == QIODevice::ReadWrite)
-        oflags = QT_OPEN_RDWR;
-    else if (mode & QIODevice::WriteOnly)
-        oflags = QT_OPEN_WRONLY;
-    if ((mode & QIODevice::WriteOnly)
-        && !(mode & QIODevice::ExistingOnly)) // QFSFileEnginePrivate::openModeCanCreate(mode))
-        oflags |= QT_OPEN_CREAT;
-    if (mode & QIODevice::Truncate)
-        oflags |= QT_OPEN_TRUNC;
-    if (mode & QIODevice::Append)
-        oflags |= QT_OPEN_APPEND;
-    if (mode & QIODevice::NewOnly)
-        oflags |= QT_OPEN_EXCL;
-    return oflags;
-}
-
 void QRandomAccessAsyncFileNativeBackend::executeOpen(OperationInfo &opInfo)
 {
     if (m_fileState != FileState::OpenPending) {
@@ -572,7 +549,7 @@ static inline int openModeToOpenFlags(QIODevice::OpenMode mode)
 
     const QByteArray nativeName = QFile::encodeName(QDir::toNativeSeparators(m_filePath));
 
-    int openFlags = openModeToOpenFlags(m_openMode);
+    int openFlags = QFSFileEnginePrivate::openModeToOpenFlags(m_openMode);
     openFlags |= O_NONBLOCK;
 
     auto sharedThis = this;