diff --git a/README.md b/README.md
index b1504f111..dd97c89f9 100644
--- a/README.md
+++ b/README.md
@@ -6,13 +6,6 @@ Clone this repository and update submodules.
 $ git clone --recursive https://github.com/sonydevworld/spresense.git
 ```
 
-After repositories have been cloned, each submodule is in 'Detached HEAD' state.
-Master branch have to be checked out before you can start developing.
-
-```
-$ git submodule foreach git checkout master
-```
-
 # Submodules
 
 ```