diff --git a/nyansat/station/imu/imu_bno055.py b/nyansat/station/imu/imu_bno055.py
index d30f00c..aca88e0 100644
--- a/nyansat/station/imu/imu_bno055.py
+++ b/nyansat/station/imu/imu_bno055.py
@@ -172,6 +172,6 @@ def upload_calibration_profile(self, filename: str) -> None:
 
     def _set_calibration_profile(self, registers) -> None:
         old_mode = self.bno.mode(CONFIG_MODE)
-        for register_name, register_address in self.CALIBRATION_REGISTERS:
+        for register_name, register_address in self.CALIBRATION_REGISTERS.items():
             self.bno._write(register_address, registers[register_name])
         self.bno.mode(old_mode)