diff -ur xserver.orig/dri3/Makefile.am xserver/dri3/Makefile.am
--- xserver.orig/dri3/Makefile.am	2018-05-10 16:32:34.000000000 +0000
+++ xserver/dri3/Makefile.am	2018-07-04 13:08:37.614326450 +0000
@@ -1,7 +1,7 @@
 noinst_LTLIBRARIES = libdri3.la
 AM_CFLAGS = \
 	-DHAVE_XORG_CONFIG_H \
-	@DIX_CFLAGS@ @XORG_CFLAGS@
+	@DIX_CFLAGS@ @XORG_CFLAGS@ @LIBDRM_CFLAGS@
 
 libdri3_la_SOURCES = \
 	dri3.h \