diff --git a/embed/trezorhal/common.c b/embed/trezorhal/common.c
index 381936f91d..9a6d05a7f3 100644
--- a/embed/trezorhal/common.c
+++ b/embed/trezorhal/common.c
@@ -56,8 +56,6 @@ void clear_otg_hs_memory(void)
 {
     // use the HAL version due to section 2.1.6 of STM32F42xx Errata sheet
     __HAL_RCC_USB_OTG_HS_CLK_ENABLE(); // enable USB_OTG_HS peripheral clock so that the peripheral memory is accessible
-    const uint32_t unpredictable = rng_get();
-    memset_reg((volatile void *) USB_OTG_HS_DATA_FIFO_RAM, (volatile void *) (USB_OTG_HS_DATA_FIFO_RAM + USB_OTG_HS_DATA_FIFO_SIZE), unpredictable);
     memset_reg((volatile void *) USB_OTG_HS_DATA_FIFO_RAM, (volatile void *) (USB_OTG_HS_DATA_FIFO_RAM + USB_OTG_HS_DATA_FIFO_SIZE), 0);
     __HAL_RCC_USB_OTG_HS_CLK_DISABLE(); // disable USB OTG_HS peripheral clock as the peripheral is not needed right now
 }