diff --git a/programs/winhlp32/winhelp.c b/programs/winhlp32/winhelp.c
index 5e854f639ac..3a421da99fe 100644
--- a/programs/winhlp32/winhelp.c
+++ b/programs/winhlp32/winhelp.c
@@ -180,7 +180,7 @@ BOOL WINHELP_GetOpenFileName(LPSTR lpszFile, int len)
     openfilename.nMaxFileTitle     = 0;
     openfilename.lpstrInitialDir   = szDir;
     openfilename.lpstrTitle        = 0;
-    openfilename.Flags             = OFN_ENABLESIZING;
+    openfilename.Flags             = OFN_ENABLESIZING | OFN_HIDEREADONLY | OFN_READONLY;
     openfilename.nFileOffset       = 0;
     openfilename.nFileExtension    = 0;
     openfilename.lpstrDefExt       = 0;