diff --git a/sys/modules/uart/Makefile b/sys/modules/uart/Makefile
index 0bff8ecd58c5..9fc15c098e04 100644
--- a/sys/modules/uart/Makefile
+++ b/sys/modules/uart/Makefile
@@ -2,8 +2,12 @@
 
 .PATH: ${.CURDIR}/../../dev/uart
 
+.if ${MACHINE_ARCH} == "sparc64"
+uart_bus_ebus=	uart_bus_ebus.c
+.endif
+
 KMOD=	uart
-SRCS=	uart_bus_acpi.c uart_bus_ebus.c uart_bus_isa.c uart_bus_pccard.c \
+SRCS=	uart_bus_acpi.c ${uart_bus_ebus} uart_bus_isa.c uart_bus_pccard.c \
 	uart_bus_pci.c uart_bus_puc.c uart_core.c uart_cpu_${MACHINE}.c \
 	uart_dev_i8251.c uart_dev_ns8250.c uart_dev_sab82532.c \
 	uart_dev_z8530.c uart_if.c uart_tty.c