diff --git a/sys/modules/ioat/Makefile b/sys/modules/ioat/Makefile
index 5a2c4177437d..3e6baadb9990 100644
--- a/sys/modules/ioat/Makefile
+++ b/sys/modules/ioat/Makefile
@@ -9,6 +9,7 @@ IOAT_SRC_PATH = ${.CURDIR}/../..
 KMOD=	ioat
 SRCS=	ioat.c ioat_test.c
 SRCS+=	device_if.h bus_if.h pci_if.h
+SRCS+=	opt_ddb.h
 
 CFLAGS+=	-I${IOAT_SRC_PATH}