diff --git a/src/termdict/sstable_termdict/sstable/sstable_index.rs b/src/termdict/sstable_termdict/sstable/sstable_index.rs
index f239b2020..c5c195a56 100644
--- a/src/termdict/sstable_termdict/sstable/sstable_index.rs
+++ b/src/termdict/sstable_termdict/sstable/sstable_index.rs
@@ -33,7 +33,8 @@ pub struct BlockAddr {
 
 #[derive(Debug, Serialize, Deserialize)]
 struct BlockMeta {
-    /// Any byte string that is lexicographically greater than the last key in the block,
+    /// Any byte string that is lexicographically greater or equal to
+    /// the last key in the block,
     /// and yet stricly smaller than the first key in the next block.
     pub last_key_or_greater: Vec<u8>,
     pub block_addr: BlockAddr,