diff --git a/src/backend/access/brin/brin_inclusion.c b/src/backend/access/brin/brin_inclusion.c
index 926487ec039..59a180d0afd 100644
--- a/src/backend/access/brin/brin_inclusion.c
+++ b/src/backend/access/brin/brin_inclusion.c
@@ -58,10 +58,14 @@
 /*-
  * The values stored in the bv_values arrays correspond to:
  *
- * 0 - the union of the values in the block range
- * 1 - whether an empty value is present in any tuple in the block range
- * 2 - whether the values in the block range cannot be merged (e.g. an IPv6
- *	   address amidst IPv4 addresses).
+ * INCLUSION_UNION
+ *		the union of the values in the block range
+ * INCLUSION_UNMERGEABLE
+ *		whether the values in the block range cannot be merged
+ *		(e.g. an IPv6 address amidst IPv4 addresses)
+ * INCLUSION_CONTAINS_EMPTY
+ *		whether an empty value is present in any tuple
+ *		in the block range
  */
 #define INCLUSION_UNION				0
 #define INCLUSION_UNMERGEABLE		1