diff --git a/include/part_efi.h b/include/part_efi.h
index c68529b..59b7895 100644
--- a/include/part_efi.h
+++ b/include/part_efi.h
@@ -60,6 +60,20 @@
 	EFI_GUID( 0x3de21764, 0x95bd, 0x54bd, \
 		0xa5, 0xc3, 0x4a, 0xbe, 0x78, 0x6f, 0x38, 0xa8)
 
+/* Special ChromiumOS things */
+#define PARTITION_CROS_KERNEL \
+	EFI_GUID(0xfe3a2a5d, 0x4f32, 0x41a7, \
+		 0xb7, 0x25, 0xac, 0xcc, 0x32, 0x85, 0xa3, 0x09)
+#define PARTITION_CROS_ROOT \
+	EFI_GUID(0x3cb8e202, 0x3b7e, 0x47dd, \
+		 0x8a, 0x3c, 0x7f, 0xf2, 0xa1, 0x3c, 0xfc, 0xec)
+#define PARTITION_CROS_FIRMWARE \
+	EFI_GUID(0xcab6e88e, 0xabf3, 0x4102, \
+		 0xa0, 0x7a, 0xd4, 0xbb, 0x9b, 0xe3, 0xc1, 0xd3)
+#define PARTITION_CROS_RESERVED \
+	EFI_GUID(0x2e0a753d, 0x9e48, 0x43b0, \
+		 0x83, 0x37, 0xb1, 0x51, 0x92, 0xcb, 0x1b, 0x5e)
+
 /* linux/include/efi.h */
 typedef u16 efi_char16_t;