diff --git a/src/dodal/devices/bimorph_mirror.py b/src/dodal/devices/bimorph_mirror.py
index 50c54489b1..0734d59390 100644
--- a/src/dodal/devices/bimorph_mirror.py
+++ b/src/dodal/devices/bimorph_mirror.py
@@ -103,7 +103,7 @@ def __init__(self, prefix: str, number_of_channels: int, name=""):
         super().__init__(name=name)
 
     @AsyncStatus.wrap
-    async def set(self, value: Mapping[int, float], tolerance: float = 0.0001) -> None:
+    async def set(self, value: Mapping[int, float]) -> None:
         """Sets bimorph voltages in parrallel via target voltage and all proc.
 
         Args: