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diff --git a/qemu/roms/ipxe/src/include/usr/sync.h b/qemu/roms/ipxe/src/include/usr/sync.h
new file mode 100644
index 000000000..0047d4ed9
--- /dev/null
+++ b/qemu/roms/ipxe/src/include/usr/sync.h
@@ -0,0 +1,14 @@
+#ifndef _USR_SYNC_H
+#define _USR_SYNC_H
+
+/** @file
+ *
+ * Wait for pending operations to complete
+ *
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+extern int sync ( unsigned long timeout );
+
+#endif /* _USR_SYNC_H */