diff --git a/sys/sys/gpt.h b/sys/sys/gpt.h
index b5f9a4038fc..b437607d885 100644
--- a/sys/sys/gpt.h
+++ b/sys/sys/gpt.h
@@ -80,11 +80,16 @@ struct gpt_ent {
 	{0x516e7cb5,0x6ecf,0x11d6,0x8f,0xf8,{0x00,0x02,0x2d,0x09,0x71,0x2b}}
 #define	GPT_ENT_TYPE_FREEBSD_UFS	\
 	{0x516e7cb6,0x6ecf,0x11d6,0x8f,0xf8,{0x00,0x02,0x2d,0x09,0x71,0x2b}}
-#define	GPT_ENT_TYPE_FREEBSD_UFS2	\
-	{0x516e7cb7,0x6ecf,0x11d6,0x8f,0xf8,{0x00,0x02,0x2d,0x09,0x71,0x2b}}
 #define	GPT_ENT_TYPE_FREEBSD_VINUM	\
 	{0x516e7cb8,0x6ecf,0x11d6,0x8f,0xf8,{0x00,0x02,0x2d,0x09,0x71,0x2b}}
 
+/*
+ * The following are unused but documented here to avoid reuse.
+ *
+ * GPT_ENT_TYPE_FREEBSD_UFS2	\
+ *	{0x516e7cb7,0x6ecf,0x11d6,0x8f,0xf8,{0x00,0x02,0x2d,0x09,0x71,0x2b}}
+ */
+
 /*
  * Foreign partition types that we're likely to encounter. Note that Linux
  * apparently choose to share data partitions with MS. I don't what the