diff --git a/boot/zephyr/Kconfig b/boot/zephyr/Kconfig
index a583fbe..b232110 100644
--- a/boot/zephyr/Kconfig
+++ b/boot/zephyr/Kconfig
@@ -419,6 +419,8 @@
 	select USB_DEVICE_STACK
 	select USB_DFU_CLASS
 	select IMG_MANAGER
+	select STREAM_FLASH
+	select MULTITHREADING
 	help
 	  If y, MCUboot waits for a prescribed duration of time to allow
 	  for USB DFU to be invoked. Please note DFU always updates the
@@ -429,6 +431,8 @@
 	select USB_DEVICE_STACK
 	select USB_DFU_CLASS
 	select IMG_MANAGER
+	select STREAM_FLASH
+	select MULTITHREADING
 	help
 	  If y, MCUboot uses GPIO to detect whether to invoke USB DFU.