diff --git a/docs/abra/trouble.md b/docs/abra/trouble.md
index 1feaade..774838f 100644
--- a/docs/abra/trouble.md
+++ b/docs/abra/trouble.md
@@ -23,6 +23,7 @@ Host example.com
 and your IdentityFile should be added to the authentication agent:
 
 ```
+eval `ssh-agent`
 ssh-add ~/.ssh/example@somewhere
 ```