1 files changed, 1 insertions, 1 deletions
diff --git a/readme.md b/readme.md
index b199678..5e7337d 100644
--- a/readme.md
+++ b/readme.md
@@ -18,7 +18,7 @@ git clone git://github.com/herumi/cybozulib_ext ; for only Windows
 ```
 
 # Build and test for Linux
-Specifiy UNIT=4 or 6 always to make.
+Specifiy UNIT=4 or 6 always to make. Default UNIT is 6.
 To make lib/libbls.a and test, run
 ```
 cd bls