diff --git a/hw/mcu/nordic/nrf_common/src/hal_flash.c b/hw/mcu/nordic/nrf_common/src/hal_flash.c
index ced9823114..be65f2b2d0 100644
--- a/hw/mcu/nordic/nrf_common/src/hal_flash.c
+++ b/hw/mcu/nordic/nrf_common/src/hal_flash.c
@@ -26,6 +26,8 @@
 
 #ifdef NRF51
 #define NRF_FLASH_SECTOR_SZ 1024
+#elif defined(NRF5340_XXAA_NETWORK)
+#define NRF_FLASH_SECTOR_SZ 2048
 #else
 #define NRF_FLASH_SECTOR_SZ 4096
 #endif