diff --git a/ui.py b/ui.py
index 56b18bb..e55fb15 100644
--- a/ui.py
+++ b/ui.py
@@ -1635,9 +1635,9 @@ def key_values(self, cursor=True):
                         chr(b + 1) for b in printer.parm.get("write_key", b'')
                     ),
                 "Write sequence":
-                    self.printer.caesar(printer.parm.get("write_key", b'')),
+                    printer.caesar(printer.parm.get("write_key", b'')),
                 "Hex write sequence":
-                    self.printer.caesar(
+                    printer.caesar(
                         printer.parm.get("write_key", b''), hex=True
                     ).upper()
             }