diff --git a/src/hardwario/chester/console.py b/src/hardwario/chester/console.py
index 4826f35..0d60fb1 100644
--- a/src/hardwario/chester/console.py
+++ b/src/hardwario/chester/console.py
@@ -68,6 +68,7 @@ def get_line(lineno):
 class Console:
 
     def __init__(self, prog: NRFJProg, history_file, console_file, latency=50):
+        self.exception = None
         channels = prog.rtt_start()
 
         is_old = False