diff --git a/variants/nrf52840/tracker-t1000-e/variant.h b/variants/nrf52840/tracker-t1000-e/variant.h
index 5b6719e12..ff63a4155 100644
--- a/variants/nrf52840/tracker-t1000-e/variant.h
+++ b/variants/nrf52840/tracker-t1000-e/variant.h
@@ -22,7 +22,9 @@
 /** Master clock frequency */
 #define VARIANT_MCK (64000000ul)
 
-#define USE_LFXO // Board uses 32khz crystal for LF
+//#define USE_LFXO // Board uses 32khz crystal for LF
+
+#define USE_LFRC 
 
 /*----------------------------------------------------------------------------
  *        Headers