diff --git a/src/gui/kernel/qplatformdialoghelper.h b/src/gui/kernel/qplatformdialoghelper.h
index 5d1d25a2dd..1c30b27175 100644
--- a/src/gui/kernel/qplatformdialoghelper.h
+++ b/src/gui/kernel/qplatformdialoghelper.h
@@ -314,15 +314,16 @@ public:
     enum DialogLabel { LookIn, FileName, FileType, Accept, Reject, DialogLabelCount };
     Q_ENUM(DialogLabel)
 
+    // keep this in sync with QFileDialog::Options
     enum FileDialogOption
     {
         ShowDirsOnly                = 0x00000001,
         DontResolveSymlinks         = 0x00000002,
         DontConfirmOverwrite        = 0x00000004,
-        DontUseNativeDialog         = 0x00000010,
-        ReadOnly                    = 0x00000020,
-        HideNameFilterDetails       = 0x00000040,
-        DontUseCustomDirectoryIcons = 0x00000080
+        DontUseNativeDialog         = 0x00000008,
+        ReadOnly                    = 0x00000010,
+        HideNameFilterDetails       = 0x00000020,
+        DontUseCustomDirectoryIcons = 0x00000040
     };
     Q_DECLARE_FLAGS(FileDialogOptions, FileDialogOption)
     Q_FLAG(FileDialogOptions)
diff --git a/src/widgets/dialogs/qfiledialog.cpp b/src/widgets/dialogs/qfiledialog.cpp
index 2dbd7c07f8..935cfeb409 100644
--- a/src/widgets/dialogs/qfiledialog.cpp
+++ b/src/widgets/dialogs/qfiledialog.cpp
@@ -830,6 +830,13 @@ void QFileDialog::setOptions(Options options)
 QFileDialog::Options QFileDialog::options() const
 {
     Q_D(const QFileDialog);
+    static_assert((int)QFileDialog::ShowDirsOnly == (int)QFileDialogOptions::ShowDirsOnly);
+    static_assert((int)QFileDialog::DontResolveSymlinks == (int)QFileDialogOptions::DontResolveSymlinks);
+    static_assert((int)QFileDialog::DontConfirmOverwrite == (int)QFileDialogOptions::DontConfirmOverwrite);
+    static_assert((int)QFileDialog::DontUseNativeDialog == (int)QFileDialogOptions::DontUseNativeDialog);
+    static_assert((int)QFileDialog::ReadOnly == (int)QFileDialogOptions::ReadOnly);
+    static_assert((int)QFileDialog::HideNameFilterDetails == (int)QFileDialogOptions::HideNameFilterDetails);
+    static_assert((int)QFileDialog::DontUseCustomDirectoryIcons == (int)QFileDialogOptions::DontUseCustomDirectoryIcons);
     return QFileDialog::Options(int(d->options->options()));
 }
 
diff --git a/src/widgets/dialogs/qfiledialog.h b/src/widgets/dialogs/qfiledialog.h
index 0a6b9e62ef..73136c3707 100644
--- a/src/widgets/dialogs/qfiledialog.h
+++ b/src/widgets/dialogs/qfiledialog.h
@@ -79,6 +79,7 @@ public:
     Q_ENUM(AcceptMode)
     enum DialogLabel { LookIn, FileName, FileType, Accept, Reject };
 
+    // keep this in sync with QFileDialogOption::FileDialogOptions
     enum Option
     {
         ShowDirsOnly                = 0x00000001,