diff --git a/src/machine/board_feather-nrf52840-sense.go b/src/machine/board_feather-nrf52840-sense.go
index 2a7845081..ab1c3fbe1 100644
--- a/src/machine/board_feather-nrf52840-sense.go
+++ b/src/machine/board_feather-nrf52840-sense.go
@@ -2,7 +2,7 @@
 
 package machine
 
-const HasLowFrequencyCrystal = true
+const HasLowFrequencyCrystal = false
 
 // GPIO Pins
 const (