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-rw-r--r--host/simu/robots/robospierre/model/clamp.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/host/simu/robots/robospierre/model/clamp.py b/host/simu/robots/robospierre/model/clamp.py
index d32edf25..4bbe988f 100644
--- a/host/simu/robots/robospierre/model/clamp.py
+++ b/host/simu/robots/robospierre/model/clamp.py
@@ -206,7 +206,7 @@ class Clamp (Observable):
slots[1].pawn is not None
or (slots[0].pawn is not None
and slots[0].pawn.kind == 'tower'))
- slots[2].contact.state = True
+ slots[2].contact.state = not (slots[2] is not None)
if slots[0].pawn:
slots[0].codebar.element_type = slots[0].pawn.kind
else: