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-rw-r--r--src/backend/storage/freespace/indexfsm.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/backend/storage/freespace/indexfsm.c b/src/backend/storage/freespace/indexfsm.c
index 1fc263892a7..614261e4e22 100644
--- a/src/backend/storage/freespace/indexfsm.c
+++ b/src/backend/storage/freespace/indexfsm.c
@@ -16,7 +16,7 @@
* This is similar to the FSM used for heap, in freespace.c, but instead
* of tracking the amount of free space on pages, we only track whether
* pages are completely free or in-use. We use the same FSM implementation
- * as for heaps, using BLCKSZ - 1 to denote used pages, and 0 for unused.
+ * as for heaps, using 0 to denote used pages, and (BLCKSZ - 1) for unused.
*
*-------------------------------------------------------------------------
*/