diff --git a/README.md b/README.md
index 16a5d96..fc7d4be 100644
--- a/README.md
+++ b/README.md
@@ -29,7 +29,7 @@ As mm2-fast is an accelerated version of minimap2-v2.18, the output of mm2-fast
 ```sh
 git clone https://github.com/lh3/minimap2.git -b v2.18
 cd minimap2 && make
-./minimap2 -ax test/MT-human.fa test/MT-orang.fa --max-chain-skip=1000000 > minimap2_output
+./minimap2 -ax map-ont test/MT-human.fa test/MT-orang.fa --max-chain-skip=1000000 > minimap2_output
 ```
 The output generated by minimap2 and mm2-fast should match. 
 ```sh