diff --git a/hardware_system.py b/hardware_system.py
index c7710e11874b181b13081f0fac3a7c6cf2a343a5..1e2fdfe7505561feffc8d9d0a9ae0d47930fdf32 100644
--- a/hardware_system.py
+++ b/hardware_system.py
@@ -354,4 +354,4 @@ class OhmPiHardware:
         self.exec_logger.debug('Resetting all mux boards ...')
         for mux_id, mux in self.mux_boards.items():
             self.exec_logger.debug(f'Resetting {mux_id}.')
-            self.mux_boards[mux].reset()
\ No newline at end of file
+            mux.reset()
\ No newline at end of file