diff --git a/src/backend/access/transam/multixact.c b/src/backend/access/transam/multixact.c
index b80d0d91033..5875ca18270 100644
--- a/src/backend/access/transam/multixact.c
+++ b/src/backend/access/transam/multixact.c
@@ -70,7 +70,7 @@
  * Note: because both MultiXactOffsets and TransactionIds are 32 bits and
  * wrap around at 0xFFFFFFFF, MultiXact page numbering also wraps around at
  * 0xFFFFFFFF/MULTIXACT_*_PER_PAGE, and segment numbering at
- * 0xFFFFFFFF/MULTIXACT_*_PER_PAGE/SLRU_SEGMENTS_PER_PAGE.  We need take no
+ * 0xFFFFFFFF/MULTIXACT_*_PER_PAGE/SLRU_PAGES_PER_SEGMENT.  We need take no
  * explicit notice of that fact in this module, except when comparing segment
  * and page numbers in TruncateMultiXact
  * (see MultiXact{Offset,Member}PagePrecedes).
diff --git a/src/backend/access/transam/subtrans.c b/src/backend/access/transam/subtrans.c
index 3b283aa5fc9..05d3f93c9fe 100644
--- a/src/backend/access/transam/subtrans.c
+++ b/src/backend/access/transam/subtrans.c
@@ -42,7 +42,7 @@
  * Note: because TransactionIds are 32 bits and wrap around at 0xFFFFFFFF,
  * SubTrans page numbering also wraps around at
  * 0xFFFFFFFF/SUBTRANS_XACTS_PER_PAGE, and segment numbering at
- * 0xFFFFFFFF/SUBTRANS_XACTS_PER_PAGE/SLRU_SEGMENTS_PER_PAGE.  We need take no
+ * 0xFFFFFFFF/SUBTRANS_XACTS_PER_PAGE/SLRU_PAGES_PER_SEGMENT.  We need take no
  * explicit notice of that fact in this module, except when comparing segment
  * and page numbers in TruncateSUBTRANS (see SubTransPagePrecedes).
  */