diff --git a/src/backend/utils/sort/logtape.c b/src/backend/utils/sort/logtape.c
index 31db75d6a44..fb0d395f44a 100644
--- a/src/backend/utils/sort/logtape.c
+++ b/src/backend/utils/sort/logtape.c
@@ -1181,10 +1181,8 @@ LogicalTapeTell(LogicalTape *lt, long *blocknum, int *offset)
 }
 
 /*
- * 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)