diff --git a/week1/02-grading-and-submission.md b/week1/02-grading-and-submission.md
index 6bd6199cd2b74bc690d830338db70b0a7e0aff7b..0db27086fd4bd5394aaa1440ea0f86946df382f4 100644
--- a/week1/02-grading-and-submission.md
+++ b/week1/02-grading-and-submission.md
@@ -37,6 +37,10 @@ haven't committed by writing:
 git status
 ```
 
+(If you get the error `Not a valid command: git`, it means you're inside `sbt`,
+you can't run git from sbt itself, you need to open another terminal in the same
+directory)
+
 This will display the list of files you have modified since the last commit, to
 see the exact changes you made, run:
 ```shell