Index: head/sys/modules/uart/Makefile
===================================================================
--- head/sys/modules/uart/Makefile	(revision 356029)
+++ head/sys/modules/uart/Makefile	(revision 356030)
@@ -1,47 +1,48 @@
 # $FreeBSD$
 
 .PATH: ${SRCTOP}/sys/dev/uart
 
 .if ${MACHINE_CPUARCH} == "aarch64" || ${MACHINE_CPUARCH} == "amd64" || \
     ${MACHINE_CPUARCH} == "i386"
 uart_bus_acpi=uart_bus_acpi.c
+uart_cpu_acpi=uart_cpu_acpi.c
 .endif
 
 .if ${MACHINE_CPUARCH} == "sparc64"
 uart_bus_ebus=	uart_bus_ebus.c
 .endif
 
 .if ${MACHINE_CPUARCH} == "aarch64" || ${MACHINE_CPUARCH} == "arm" || \
     ${MACHINE_CPUARCH} == "powerpc" || ${MACHINE_CPUARCH} == "riscv" || \
     ${MACHINE_CPUARCH} == "sparc64"
 ofw_bus_if=	ofw_bus_if.h
 .endif
 
 .if ${MACHINE} == "i386" || ${MACHINE} == "amd64"
 _uart_cpu=uart_cpu_x86.c
 .else
 _uart_cpu=uart_cpu_${MACHINE}.c
 .endif
 .if exists(${.CURDIR:H:H}/dev/uart/${_uart_cpu})
 uart_cpu_machine= ${_uart_cpu}
 .endif
 
 .if ${MACHINE} == "arm64"
 uart_dev_mvebu=uart_dev_mvebu.c
 uart_dev_mu=uart_dev_mu.c
 .endif
 
 KMOD=	uart
 SRCS=	${uart_bus_acpi} ${uart_bus_ebus} uart_bus_isa.c uart_bus_pccard.c \
 	uart_bus_pci.c uart_bus_puc.c uart_bus_scc.c \
-	uart_core.c ${uart_cpu_machine} uart_dbg.c \
+	uart_core.c ${uart_cpu_acpi} ${uart_cpu_machine} uart_dbg.c \
 	${uart_dev_mvebu} uart_dev_ns8250.c ${uart_dev_mu} \
 	uart_dev_quicc.c uart_dev_sab82532.c uart_dev_z8530.c \
 	uart_if.c uart_if.h uart_subr.c uart_tty.c
 
 SRCS+=	acpi_if.h bus_if.h card_if.h device_if.h isa_if.h ${ofw_bus_if} \
 	pci_if.h \
 	power_if.h pccarddevs.h serdev_if.h
 SRCS+=	opt_acpi.h opt_platform.h opt_uart.h
 
 .include <bsd.kmod.mk>