diff --git a/src/backend/access/transam/xlogreader.c b/src/backend/access/transam/xlogreader.c
index 7d40029b08..b97828eb12 100644
--- a/src/backend/access/transam/xlogreader.c
+++ b/src/backend/access/transam/xlogreader.c
@@ -1404,7 +1404,7 @@ XLogRecGetBlockData(XLogReaderState *record, uint8 block_id, Size *len)
 /*
  * Restore a full-page image from a backup block attached to an XLOG record.
  *
- * Returns the buffer number containing the page.
+ * Returns true if a full-page image is restored.
  */
 bool
 RestoreBlockImage(XLogReaderState *record, uint8 block_id, char *page)