diff --git a/doc/stub/potr/context.py b/doc/stub/potr/context.py
index 23ce6efa..65f7826f 100644
--- a/doc/stub/potr/context.py
+++ b/doc/stub/potr/context.py
@@ -2,7 +2,6 @@
 class NotEncryptedError: pass
 class UnencryptedMessage: pass
 class ErrorReceived: pass
-class NotEncryptedError: pass
 class NotOTRMessage: pass
 STATE_ENCRYPTED, STATE_PLAINTEXT, STATE_FINISHED = 1, 1, 1
 class Context: pass