diff --git a/boot/zephyr/boards/nrf54l15dk_nrf54l15_cpuapp_ext_flash.conf b/boot/zephyr/boards/nrf54l15dk_nrf54l15_cpuapp_ext_flash.conf
index 8fc12e074..12650a9ed 100644
--- a/boot/zephyr/boards/nrf54l15dk_nrf54l15_cpuapp_ext_flash.conf
+++ b/boot/zephyr/boards/nrf54l15dk_nrf54l15_cpuapp_ext_flash.conf
@@ -13,3 +13,6 @@ CONFIG_NORDIC_QSPI_NOR=n
 CONFIG_FPROTECT=n
 
 CONFIG_BOOT_WATCHDOG_FEED=n
+
+# Ensure the fastest RRAM write operations
+CONFIG_NRF_RRAM_WRITE_BUFFER_SIZE=32