diff --git a/sys/modules/linuxkpi/Makefile b/sys/modules/linuxkpi/Makefile
index 6a256bf1f8e1..935584e39376 100644
--- a/sys/modules/linuxkpi/Makefile
+++ b/sys/modules/linuxkpi/Makefile
@@ -1,48 +1,49 @@
 # $FreeBSD$
 .PATH:	${SRCTOP}/sys/compat/linuxkpi/common/src
 
 KMOD=	linuxkpi
 SRCS=	linux_compat.c \
 	linux_current.c \
 	linux_devres.c \
 	linux_dmi.c \
 	linux_domain.c \
 	linux_firmware.c \
 	linux_fpu.c \
 	linux_hrtimer.c \
 	linux_idr.c \
 	linux_interrupt.c \
 	linux_i2c.c \
 	linux_i2cbb.c \
 	linux_kmod.c \
 	linux_kthread.c \
 	linux_lock.c \
 	linux_netdev.c \
 	linux_page.c \
 	linux_pci.c \
 	linux_radix.c \
 	linux_rcu.c \
 	linux_seq_file.c \
 	linux_schedule.c \
 	linux_shmemfs.c \
 	linux_shrinker.c \
 	linux_skbuff.c \
 	linux_slab.c \
 	linux_tasklet.c \
 	linux_usb.c \
 	linux_work.c \
 	linux_xarray.c
 
 .if ${MACHINE_CPUARCH} == "aarch64" || ${MACHINE_CPUARCH} == "amd64" || \
     ${MACHINE_CPUARCH} == "i386"
 SRCS+=	opt_acpi.h acpi_if.h linux_acpi.c
 .endif
 
+SRCS+=	opt_ddb.h
 SRCS+=	${LINUXKPI_GENSRCS}
 
 CFLAGS+= -I${SRCTOP}/sys/compat/linuxkpi/common/include
 CFLAGS+= -I${SRCTOP}/sys/contrib/ck/include
 
 EXPORT_SYMS=	YES
 
 .include <bsd.kmod.mk>