--- src/tun/Makefile.orig	2014-10-20 20:59:47.000000000 +0200
+++ src/tun/Makefile	2019-02-20 20:25:21.000000000 +0100
@@ -20,7 +20,7 @@
 BUNDLE_PACKAGETYPE = KEXT
 BUNDLE_VERSION = $(TUN_KEXT_VERSION)
 
-INCLUDE = -I.. -I/System/Library/Frameworks/Kernel.framework/Headers
+INCLUDE = -I.. -I@SDKROOT@/System/Library/Frameworks/Kernel.framework/Versions/A/Headers
 CFLAGS = -Wall -Wextra -mkernel -force_cpusubtype_ALL \
 	-nostdinc -fno-builtin -fno-stack-protector -msoft-float -fno-common \
 	@ARCHFLAGS@ \
--- src/tap/Makefile.orig	2014-10-20 20:59:30.000000000 +0200
+++ src/tap/Makefile	2019-02-20 20:25:52.000000000 +0100
@@ -19,7 +19,7 @@
 BUNDLE_PACKAGETYPE = KEXT
 BUNDLE_VERSION = $(TAP_KEXT_VERSION)
 
-INCLUDE = -I.. -I/System/Library/Frameworks/Kernel.framework/Headers
+INCLUDE = -I.. -I@SDKROOT@/System/Library/Frameworks/Kernel.framework/Versions/A/Headers
 CFLAGS = -Wall -Wextra -mkernel -force_cpusubtype_ALL \
 	-nostdinc -fno-builtin -fno-stack-protector -msoft-float -fno-common \
 	@ARCHFLAGS@ \