Index: uspace/lib/label/include/std/mbr.h
===================================================================
--- uspace/lib/label/include/std/mbr.h	(revision 603c1d1f2f250c70a6ee5b7b75494f1ed4c16e1a)
+++ uspace/lib/label/include/std/mbr.h	(revision 100b1d15bc8b3b4b6e2eb4fe8a62a4fe84653a36)
@@ -49,5 +49,10 @@
 
 	/** Boot record signature */
-	mbr_br_signature = 0xAA55
+	mbr_br_signature = 0xAA55,
+
+	/** EBR PTE slot describing partition corresponding to this EBR */
+	mbr_ebr_pte_this = 0,
+	/** EBR PTE slot describing the next EBR */
+	mbr_ebr_pte_next = 1
 };