diff --git a/ports/nrf/boards/challenger_840/challenger_840.py b/ports/nrf/boards/challenger_840/challenger_840.py
index b40ae22b41..bf3ae77170 100644
--- a/ports/nrf/boards/challenger_840/challenger_840.py
+++ b/ports/nrf/boards/challenger_840/challenger_840.py
@@ -5,10 +5,12 @@ _LDO_PIN = digitalio.DigitalInOut(board.LDO_CONTROL)
 _LDO_PIN.direction = digitalio.Direction.OUTPUT
 _LDO_PIN.value = True
 
+
 def ldo_on():
     global _LDO_PIN
     _LDO_PIN.value = True
 
+
 def ldo_off():
     global _LDO_PIN
     _LDO_PIN.value = False