diff --git a/qemu/util/oslib-posix.c b/qemu/util/oslib-posix.c
index c02556fa..8457fab9 100644
--- a/qemu/util/oslib-posix.c
+++ b/qemu/util/oslib-posix.c
@@ -59,6 +59,7 @@
 
 #ifdef __FreeBSD__
 #include <sys/sysctl.h>
+#include <sys/user.h>
 #endif
 
 #include "qemu/mmap-alloc.h"