diff --git a/src/backend/partitioning/partbounds.c b/src/backend/partitioning/partbounds.c
index 318d8ecae9..4bc88104ee 100644
--- a/src/backend/partitioning/partbounds.c
+++ b/src/backend/partitioning/partbounds.c
@@ -360,9 +360,8 @@ create_list_bounds(PartitionBoundSpec **boundspecs, int nparts,
 			else
 			{
 				/*
-				 * Never put a null into the values array, flag instead for
-				 * the code further down below where we construct the actual
-				 * relcache struct.
+				 * Never put a null into the values array; save the index of
+				 * the partition that stores nulls, instead.
 				 */
 				if (null_index != -1)
 					elog(ERROR, "found null more than once");