diff --git a/skidl/Bus.py b/skidl/Bus.py
index b20a1de5..1c0b131f 100644
--- a/skidl/Bus.py
+++ b/skidl/Bus.py
@@ -121,8 +121,8 @@ def __init__(self, name, *args, **attribs):
 
         # Add the bus to the circuit.
         self.circuit = (
-            None
-        )  # Bus won't get added if it's already seen as part of circuit.
+            None  # Bus won't get added if it's already seen as part of circuit.
+        )
         attribs[
             "circuit"
         ] += self  # Add bus to circuit. This also sets self.circuit again.