diff --git a/Justfile b/Justfile
index c58d80b..f9625f5 100755
--- a/Justfile
+++ b/Justfile
@@ -298,6 +298,7 @@ switch-gpg-card:
 
 	# export pubkey and ownertrust
 	gpg2 --output "${KEY_ID}".pubkey --export "${KEY_ID}"
+	# if this fails the trust in the key is missing and can be fixed with `gpg --edit-key ${KEY_ID}`
 	gpg2 --export-ownertrust | rg "${KEY_ID}" > "${KEY_ID}".ownertrust
 
 	# delete the key