diff --git a/README.md b/README.md
index 820225c..20e2827 100644
--- a/README.md
+++ b/README.md
@@ -98,6 +98,12 @@ You might be interested in the exit codes of `grub2-verify` to use it in your mo
 
 ## Troubleshooting
 
+### I receive an error gpg: signing failed: Permission denied
+
+Make sure that the tty you are in belongs to you (root). To do so:
+`chown root:root $(tty)`
+
+
 ### I forgot to run grub2-unsign before I made changes. What now?
 
 Run `grub2-verify` to see, which signature is bad. Remove the signature and run `grub2-unsign`, after this `grub2-sign`.