diff -uNr qemu-2.12.1/qga/main.c qemu-2.12.1.mod/qga/main.c
--- qemu-2.12.1/qga/main.c	2018-08-03 00:48:53.000000000 +0300
+++ qemu-2.12.1.mod/qga/main.c	2018-09-17 16:27:47.017395933 +0300
@@ -45,6 +45,8 @@
 #endif
 #endif
 
+#include "lockf_implementation.h"
+
 #ifndef _WIN32
 #define QGA_VIRTIO_PATH_DEFAULT "/dev/virtio-ports/org.qemu.guest_agent.0"
 #define QGA_STATE_RELATIVE_DIR  "run"