diff --git a/usr.sbin/bhyve/net_backend_slirp.c b/usr.sbin/bhyve/net_backend_slirp.c
index c98e54b2ee8..f2b483c5e31 100644
--- a/usr.sbin/bhyve/net_backend_slirp.c
+++ b/usr.sbin/bhyve/net_backend_slirp.c
@@ -73,11 +73,12 @@ struct slirp_priv {
 	struct mevent *mevp;
 };
 
+extern char **environ;
+
 static int
 slirp_init(struct net_backend *be, const char *devname __unused,
     nvlist_t *nvl, net_be_rxeof_t cb, void *param)
 {
-	extern char **environ;
 	struct slirp_priv *priv = NET_BE_PRIV(be);
 	nvlist_t *config;
 	posix_spawn_file_actions_t fa;