diff --git a/README b/README
index db21ae2..9a755c2 100644
--- a/README
+++ b/README
@@ -15,8 +15,9 @@ which should be safe to use on all included files (ie. no top level code should
 create geometry).
 
 If you host your project in git, you can do "git submodule add URL PATH" in your
-repo to import this library as a git submodule for easy usage. Then you need to do a "git submodule update --init". See
-"git help submodule"" for more info.
+repo to import this library as a git submodule for easy usage. Then you need to do
+a "git submodule update --init". When you want to update the submodule,
+do "cd PATH; git checkout master; git pull". See "git help submodule"" for more info.
 
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