diff --git a/parttypes.cc b/parttypes.cc
index 96bf5e9..88eef57 100644
--- a/parttypes.cc
+++ b/parttypes.cc
@@ -121,6 +121,14 @@
    AddType(0xa504, "516E7CBA-6ECF-11D6-8FF8-00022D09712B", "FreeBSD ZFS");
    AddType(0xa505, "516E7CB8-6ECF-11D6-8FF8-00022D09712B", "FreeBSD Vinum/RAID");
 
+   // Midnight BSD partition types....
+   AddType(0xa580, "85D5E45A-237C-11E1-B4B3-E89A8F7FC3A7", "Midnight BSD data");
+   AddType(0xa581, "85D5E45E-237C-11E1-B4B3-E89A8F7FC3A7", "Midnight BSD boot");
+   AddType(0xa582, "85D5E45B-237C-11E1-B4B3-E89A8F7FC3A7", "Midnight BSD swap");
+   AddType(0xa583, "0394Ef8B-237E-11E1-B4B3-E89A8F7FC3A7", "Midnight BSD UFS");
+   AddType(0xa584, "85D5E45D-237C-11E1-B4B3-E89A8F7FC3A7", "Midnight BSD ZFS");
+   AddType(0xa585, "85D5E45C-237C-11E1-B4B3-E89A8F7FC3A7", "Midnight BSD Vinum");
+
    // A MacOS partition type, separated from others by NetBSD partition types...
    AddType(0xa800, "55465300-0000-11AA-AA11-00306543ECAC", "Apple UFS"); // Mac OS X