diff --git a/Makefile b/Makefile
index 3927016..fa90422 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 TARGET ?= host
-TARGET := $(filter host stm32f0 stm32f1,${TARGET})
+TARGET := $(filter host stm32f0 stm32f1 virtual,${TARGET})
 
 ifeq (${TARGET},)
 $(error No support available for the target)
diff --git a/source/core/Makefile b/source/core/Makefile
index d90e8e0..297a292 100644
--- a/source/core/Makefile
+++ b/source/core/Makefile
@@ -1 +1 @@
-tbm-obj-y += source/core/flash.o
+tbm-obj-y += source/core/flash.o source/core/spi.o