diff --git a/docs/abra/trouble.md b/docs/abra/trouble.md
index 986e054..aedb82a 100644
--- a/docs/abra/trouble.md
+++ b/docs/abra/trouble.md
@@ -20,6 +20,12 @@ Host example.com
   IdentityFile ~/.ssh/example@somewhere
 ```
 
+and your IdentityFile should be added to the authentication agent:
+
+```
+ssh-add ~/.ssh/example@somewhere
+```
+
 ## "abra server ls" shows the wrong details?
 
 You can use `abra server rm` to remove the incorrect details. Make sure to take a backup of your `~/.abra/servers/<domain>` first. You can then try to re-create by using `abra server add ...` again.