diff --git a/include/commdlg.h b/include/commdlg.h
index 7bd144f..3ef3a27 100644
--- a/include/commdlg.h
+++ b/include/commdlg.h
@@ -230,6 +230,9 @@
 #define FR_HIDEUPDOWN                   0x00004000
 #define FR_HIDEMATCHCASE                0x00008000
 #define FR_HIDEWHOLEWORD                0x00010000
+#define FR_MATCHDIAC                    0x20000000
+#define FR_MATCHKASHIDA                 0x40000000
+#define FR_MATCHALEFHAMZA               0x80000000
 
 typedef UINT (CALLBACK *LPCFHOOKPROC)(HWND,UINT,WPARAM,LPARAM);