diff --git a/sys/modules/uart/Makefile b/sys/modules/uart/Makefile
index 6e4843b406b..9a21ddc317f 100644
--- a/sys/modules/uart/Makefile
+++ b/sys/modules/uart/Makefile
@@ -34,6 +34,6 @@ SRCS=	uart_bus_acpi.c ${uart_bus_ebus} uart_bus_isa.c uart_bus_pccard.c \
 
 SRCS+=	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_platform.h
+SRCS+=	opt_platform.h opt_uart.h
 
 .include <bsd.kmod.mk>