diff --git a/sys/modules/tpm/Makefile b/sys/modules/tpm/Makefile
index 81f571b164ef..c859e010b2d9 100644
--- a/sys/modules/tpm/Makefile
+++ b/sys/modules/tpm/Makefile
@@ -1,27 +1,28 @@
 
 .PATH:	${SRCTOP}/sys/dev/tpm
 
 KMOD=	tpm
 
 SRCS=	bus_if.h device_if.h tpm_if.c tpm_if.h
 SRCS+=	opt_acpi.h opt_tpm.h
 
 #Bus specific stuff.
 .if ${MACHINE_ARCH:Namd64:Ni386} == ""
 SRCS+= tpm.c
 SRCS+=	tpm_acpi.c tpm_isa.c
 SRCS+=	isa_if.h
 .endif
 
 #TPM 2.0
 SRCS+=	tpm20.c tpm_tis_core.c
 .if defined(${OPT_FDT})
 SRCS+=  tpm_spibus.c tpm_tis_spibus.c spibus_if.h
 .endif
 .if ${MACHINE_ARCH:Namd64:Ni386:Narm64} == ""
 SRCS+= acpi_if.h
 SRCS+= tpm_tis_acpi.c
 SRCS+= tpm_crb.c
+SRCS+= tpm_bus.c
 .endif
 
 .include <bsd.kmod.mk>