Index: lib/qemu/block-raw-posix.c
--- lib/qemu/block-raw-posix.c.orig
+++ lib/qemu/block-raw-posix.c
@@ -30,7 +30,11 @@
 #endif
 #include "block_int.h"
 #include <assert.h>
+#ifdef __OpenBSD__
+#include <aio_compat.h>
+#else
 #include <aio.h>
+#endif
 
 #ifdef CONFIG_COCOA
 #include <paths.h>
