diff --git a/src/backend/access/rmgrdesc/nbtdesc.c b/src/backend/access/rmgrdesc/nbtdesc.c
index 7631cb5c73f..ee7387873d1 100644
--- a/src/backend/access/rmgrdesc/nbtdesc.c
+++ b/src/backend/access/rmgrdesc/nbtdesc.c
@@ -40,8 +40,8 @@ btree_desc(StringInfo buf, XLogReaderState *record)
 			{
 				xl_btree_split *xlrec = (xl_btree_split *) rec;
 
-				appendStringInfo(buf, "level %u, firstright %d",
-								 xlrec->level, xlrec->firstright);
+				appendStringInfo(buf, "level %u, firstright %d, newitemoff %d",
+								 xlrec->level, xlrec->firstright, xlrec->newitemoff);
 				break;
 			}
 		case XLOG_BTREE_VACUUM:
diff --git a/src/include/access/nbtree.h b/src/include/access/nbtree.h
index a2bd73de9a5..92c1e66c416 100644
--- a/src/include/access/nbtree.h
+++ b/src/include/access/nbtree.h
@@ -265,11 +265,11 @@ typedef struct xl_btree_insert
  *
  * Note: the four XLOG_BTREE_SPLIT xl_info codes all use this data record.
  * The _L and _R variants indicate whether the inserted tuple went into the
- * left or right split page (and thus, whether newitemoff and the new item
- * are stored or not).  The _ROOT variants indicate that we are splitting
- * the root page, and thus that a newroot record rather than an insert or
- * split record should follow.  Note that a split record never carries a
- * metapage update --- we'll do that in the parent-level update.
+ * left or right split page (and thus, whether the new item is stored or not).
+ * The _ROOT variants indicate that we are splitting the root page, and thus
+ * that a newroot record rather than an insert or split record should follow.
+ * Note that a split record never carries a metapage update --- we'll do that
+ * in the parent-level update.
  *
  * Backup Blk 0: original page / new left page
  *
@@ -291,7 +291,7 @@ typedef struct xl_btree_split
 {
 	uint32		level;			/* tree level of page being split */
 	OffsetNumber firstright;	/* first item moved to right page */
-	OffsetNumber newitemoff;	/* new item's offset (if placed on left page) */
+	OffsetNumber newitemoff;	/* new item's offset (useful for _L variants) */
 } xl_btree_split;
 
 #define SizeOfBtreeSplit	(offsetof(xl_btree_split, newitemoff) + sizeof(OffsetNumber))