diff --git a/magic/Magdir/msdos b/magic/Magdir/msdos
index f8852cb..36bd51c 100644
--- a/magic/Magdir/msdos
+++ b/magic/Magdir/msdos
@@ -841,7 +841,12 @@
# Dell's .hdr
0 string $RBU
>23 string Dell %s system BIOS
->48 string x version %.3s
+>5 byte 2
+>>48 byte x version %d.
+>>49 byte x \b%d.
+>>50 byte x \b%d
+>5 byte <2
+>>48 string x version %.3s
# Type: Microsoft DirectDraw Surface
# URL: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/directx9_c/directx/graphics/reference/DDSFileReference/ddsfileformat.asp