diff --git a/src/backend/utils/sort/logtape.c b/src/backend/utils/sort/logtape.c
index 95b174fc7e..30238764d0 100644
--- a/src/backend/utils/sort/logtape.c
+++ b/src/backend/utils/sort/logtape.c
@@ -1261,10 +1261,8 @@ LogicalTapeTell(LogicalTapeSet *lts, int tapenum,
 }
 
 /*
- * Obtain total disk space currently used by a LogicalTapeSet, in blocks.
- *
- * This should not be called while there are open write buffers; otherwise it
- * may not account for buffered data.
+ * Obtain total disk space currently used by a LogicalTapeSet, in blocks. Does
+ * not account for open write buffer, if any.
  */
 long
 LogicalTapeSetBlocks(LogicalTapeSet *lts)