diff --git a/boot/zephyr/boards/nrf52840dk_qspi_secondary_boot.conf b/boot/zephyr/boards/nrf52840dk_qspi_secondary_boot.conf
index 9f984be4f..5f3b7808b 100644
--- a/boot/zephyr/boards/nrf52840dk_qspi_secondary_boot.conf
+++ b/boot/zephyr/boards/nrf52840dk_qspi_secondary_boot.conf
@@ -1,2 +1 @@
-CONFIG_MULTITHREADING=y
 CONFIG_BOOT_MAX_IMG_SECTORS=256
diff --git a/boot/zephyr/boards/nrf54h20dk_nrf54h20_cpuapp_iron.conf b/boot/zephyr/boards/nrf54h20dk_nrf54h20_cpuapp_iron.conf
index 50d349255..12c96ff0f 100644
--- a/boot/zephyr/boards/nrf54h20dk_nrf54h20_cpuapp_iron.conf
+++ b/boot/zephyr/boards/nrf54h20dk_nrf54h20_cpuapp_iron.conf
@@ -7,5 +7,3 @@
 CONFIG_SPI_NOR=n
 
 CONFIG_BOOT_WATCHDOG_FEED=n
-
-CONFIG_MULTITHREADING=y