Index: uspace/lib/label/include/std/gpt.h
===================================================================
--- uspace/lib/label/include/std/gpt.h	(revision 1626cd4d3269f272038f96a6fa17c3536f1b084c)
+++ uspace/lib/label/include/std/gpt.h	(revision b7a4d06b6d03da11c24ad8eee4f374f7b8a7dc13)
@@ -38,6 +38,14 @@
 #include <sys/types.h>
 
-/** Block address of GPT header. */
-#define GPT_HDR_BA	1
+enum {
+	/** Block address of primary GPT header. */
+	gpt_hdr_ba = 1,
+
+	/** Minimum size of partition table in bytes, required by std. */
+	gpt_ptable_min_size = 16384,
+
+	/** GPT revision */
+	gpt_revision = 0x00010000
+};
 
 /** GPT header */