diff --git a/sys/modules/p2sb/Makefile b/sys/modules/p2sb/Makefile
index 8f4d604f73d5..8dc643240d27 100644
--- a/sys/modules/p2sb/Makefile
+++ b/sys/modules/p2sb/Makefile
@@ -1,7 +1,7 @@
 .PATH: ${.CURDIR}/../../dev/p2sb
 
 KMOD= p2sb
 SRCS= p2sb.c lewisburg_gpio.c lewisburg_gpiocm.c
-SRCS+=	device_if.h bus_if.h pci_if.h gpio_if.h
+SRCS+=	device_if.h bus_if.h pci_if.h gpio_if.h opt_platform.h
 
 .include <bsd.kmod.mk>