diff --git a/sys/sys/diskmbr.h b/sys/sys/diskmbr.h
index c92364d4305..cb05ffa5462 100644
--- a/sys/sys/diskmbr.h
+++ b/sys/sys/diskmbr.h
@@ -57,6 +57,7 @@
 #define	DOSPTYP_LINUX	0x83	/* Linux partition */
 #define	DOSPTYP_LINLVM	0x8e	/* Linux LVM partition */
 #define	DOSPTYP_PMBR	0xee	/* GPT Protective MBR */
+#define	DOSPTYP_EFI	0xef	/* EFI FAT parition */
 #define	DOSPTYP_VMFS	0xfb	/* VMware VMFS partition */
 #define	DOSPTYP_VMKDIAG	0xfc	/* VMware vmkDiagnostic partition */
 #define	DOSPTYP_LINRAID	0xfd	/* Linux raid partition */