diff --git a/docs/doxygen/mainpages/const_cpp.h b/docs/doxygen/mainpages/const_cpp.h
index 953bc5e765..d8ef19b784 100644
--- a/docs/doxygen/mainpages/const_cpp.h
+++ b/docs/doxygen/mainpages/const_cpp.h
@@ -196,6 +196,7 @@ Currently the following symbols exist:
     supports template Read() and Write() methods in wxConfig.}
 @itemdef{wxHAS_LARGE_FILES, Defined if wxFile supports files more than 4GB in size.}
 @itemdef{wxHAS_LARGE_FFILES, Defined if wxFFile supports files more than 4GB in size.}
+@itemdef{wxHAS_MULTIPLE_FILEDLG_FILTERS, Defined if wxFileDialog supports multiple ('|'-separated) filters.}
 @itemdef{wxHAS_POWER_EVENTS, Defined if wxPowerEvent are ever generated on the current platform.}
 @itemdef{wxHAS_RADIO_MENU_ITEMS,
         Defined if the current port supports radio menu items (see wxMenu::AppendRadioItem).}
diff --git a/include/wx/filedlg.h b/include/wx/filedlg.h
index ed59dec238..68639359df 100644
--- a/include/wx/filedlg.h
+++ b/include/wx/filedlg.h
@@ -19,6 +19,11 @@
 #include "wx/dialog.h"
 #include "wx/arrstr.h"
 
+// this symbol is defined for the platforms which support multiple 
+#if defined(__WXMSW__) || defined(__WXGTK__) || defined(__WXMAC__)
+    #define wxHAS_MULTIPLE_FILEDLG_FILTERS
+#endif
+
 //----------------------------------------------------------------------------
 // wxFileDialog data
 //----------------------------------------------------------------------------