diff --git a/src/include/nodes/execnodes.h b/src/include/nodes/execnodes.h
index fdf79aa18a2..09ea5998aad 100644
--- a/src/include/nodes/execnodes.h
+++ b/src/include/nodes/execnodes.h
@@ -178,6 +178,7 @@ typedef struct ExprState
  *		IndexUnchanged		aminsert hint, cached for retail inserts
  *		Concurrent			are we doing a concurrent index build?
  *		BrokenHotChain		did we detect any broken HOT chains?
+ *		WithoutOverlaps		is it a WITHOUT OVERLAPS index?
  *		Summarizing			is it a summarizing index?
  *		ParallelWorkers		# of workers requested (excludes leader)
  *		Am					Oid of index AM