diff --git a/sys/conf/kern.pre.mk b/sys/conf/kern.pre.mk
--- a/sys/conf/kern.pre.mk
+++ b/sys/conf/kern.pre.mk
@@ -293,7 +293,8 @@
 .endif
 
 # Linux Kernel Programming Interface C-flags
-LINUXKPI_INCLUDES=	-I$S/compat/linuxkpi/common/include
+LINUXKPI_INCLUDES=	-I$S/compat/linuxkpi/common/include \
+			-I$S/compat/linuxkpi/dummy/include
 LINUXKPI_C=		${NORMAL_C} ${LINUXKPI_INCLUDES}
 
 # Infiniband C flags.  Correct include paths and omit errors that linux
diff --git a/sys/conf/kmod.mk b/sys/conf/kmod.mk
--- a/sys/conf/kmod.mk
+++ b/sys/conf/kmod.mk
@@ -109,7 +109,8 @@
 	opt_stack.h
 
 LINUXKPI_INCLUDES+= \
-	-I${SYSDIR}/compat/linuxkpi/common/include
+	-I${SYSDIR}/compat/linuxkpi/common/include \
+	-I${SYSDIR}/compat/linuxkpi/dummy/include
 
 CFLAGS+=	${WERROR}
 CFLAGS+=	-D_KERNEL