diff --git a/cpu/nrf5x_common/periph/hwrng.c b/cpu/nrf5x_common/periph/hwrng.c
index 5510c080be..2a9b9a202b 100644
--- a/cpu/nrf5x_common/periph/hwrng.c
+++ b/cpu/nrf5x_common/periph/hwrng.c
@@ -30,7 +30,8 @@
 
 void hwrng_init(void)
 {
-    /* nothing to do here */
+    /* enable bias correction */
+    NRF_RNG->CONFIG = 1;
 }
 
 /*