Index: dll/cpl/desk/background.c
===================================================================
--- dll/cpl/desk/background.c	(revision 61592)
+++ dll/cpl/desk/background.c	(working copy)
@@ -446,7 +446,7 @@
     ofn.lpstrFileTitle = fileTitle;
     ofn.nMaxFileTitle = 256;
     ofn.lpstrInitialDir = NULL;
-    ofn.Flags = OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST;
+    ofn.Flags = OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST | OFN_HIDEREADONLY;
 
     if (GetOpenFileName(&ofn) == TRUE)
     {