diff --git a/src/backend/access/rmgrdesc/nbtdesc.c b/src/backend/access/rmgrdesc/nbtdesc.c
index 80bd70a975..4d7d8e6aab 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/nbtxlog.h b/src/include/access/nbtxlog.h
index 819373031c..d69c9e33ba 100644
--- a/src/include/access/nbtxlog.h
+++ b/src/include/access/nbtxlog.h
@@ -82,12 +82,12 @@ 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 _HIGHKEY variants indicate that we've logged
- * explicitly left page high key value, otherwise redo should use right page
- * leftmost key as a left page high key.  _HIGHKEY is specified for internal
- * pages where right page leftmost key is suppressed, and for leaf pages
- * of covering indexes where high key have non-key attributes truncated.
+ * left or right split page (and thus, whether the new item is stored or not).
+ * The _HIGHKEY variants indicate that we've logged explicitly left page high
+ * key value, otherwise redo should use right page leftmost key as a left page
+ * high key.  _HIGHKEY is specified for internal pages where right page
+ * leftmost key is suppressed, and for leaf pages of covering indexes where
+ * high key have non-key attributes truncated.
  *
  * Backup Blk 0: original page / new left page
  *
@@ -109,7 +109,7 @@ 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 variant) */
 } xl_btree_split;
 
 #define SizeOfBtreeSplit	(offsetof(xl_btree_split, newitemoff) + sizeof(OffsetNumber))