diff --git a/include/wx/osx/filedlg.h b/include/wx/osx/filedlg.h
index aa9f39da24..1d3ccc5504 100644
--- a/include/wx/osx/filedlg.h
+++ b/include/wx/osx/filedlg.h
@@ -19,7 +19,7 @@
 // set this system option to 1 in order to always show the filetypes popup in 
 // file open dialogs if possible
 
-#define wxOSX_FILEDIALOG_ALWAYS_SHOW_TYPES wxT("osx.filedlg.always-show-types")
+#define wxOSX_FILEDIALOG_ALWAYS_SHOW_TYPES wxT("osx.openfiledialog.always-show-types")
 
 class WXDLLIMPEXP_CORE wxFileDialog: public wxFileDialogBase
 {