diff --git a/drivers/bus/mhi/core/Makefile b/drivers/bus/mhi/core/Makefile
index 66e2700c9032..bc1469778cf8 100644
--- a/drivers/bus/mhi/core/Makefile
+++ b/drivers/bus/mhi/core/Makefile
@@ -1,3 +1,3 @@
-obj-$(CONFIG_MHI_BUS) := mhi.o
+obj-$(CONFIG_MHI_BUS) += mhi.o
 
 mhi-y := init.o main.o pm.o boot.o