diff -uNr qemu-2.12.1/scsi/qemu-pr-helper.c qemu-2.12.1.mod/scsi/qemu-pr-helper.c
--- qemu-2.12.1/scsi/qemu-pr-helper.c	2018-08-03 00:48:53.000000000 +0300
+++ qemu-2.12.1.mod/scsi/qemu-pr-helper.c	2018-09-17 16:27:47.020729287 +0300
@@ -24,6 +24,8 @@
 #include <linux/dm-ioctl.h>
 #include <scsi/sg.h>
 
+#include "lockf_implementation.h"
+
 #ifdef CONFIG_LIBCAP
 #include <cap-ng.h>
 #endif