diff --git a/drivers/usb/emul/Makefile b/drivers/usb/emul/Makefile
index 8fd83d5..b64ac6d 100644
--- a/drivers/usb/emul/Makefile
+++ b/drivers/usb/emul/Makefile
@@ -7,4 +7,5 @@
 
 obj-$(CONFIG_USB_EMUL) += sandbox_flash.o
 obj-$(CONFIG_USB_EMUL) += sandbox_hub.o
+obj-$(CONFIG_USB_EMUL) += sandbox_keyb.o
 obj-$(CONFIG_USB_EMUL) += usb-emul-uclass.o