diff --git a/README.md b/README.md
index 24aaaf5..4117fd1 100644
--- a/README.md
+++ b/README.md
@@ -40,7 +40,7 @@ The output generated by minimap2 and mm2-fast should match.
 ```sh
 diff minimap2_output mm2-fast_output > diff_result
 ```
-The file ```diff_result``` should empty, meaning a difference of 0 lines.
+The file ```diff_result``` should be empty, meaning a difference of 0 lines.
 
 ### Advanced options
 The default compilation using make applies two optimizations: vectorized chaining and sequence alignment. The learned-indexes based seeding is disabled by default as it requires availability of [Rust](https://en.wikipedia.org/wiki/Rust_(programming_language)). This is because the learned hash-table uses an external training library that runs on Rust. Rust is trivial to install, see https://rustup.rs/ and add its path to .bashrc file. Rust installation only takes a few seconds. Following are the steps to enable learned hash table optimization in mm2-fast: