diff --git a/wired/ethdev.c b/wired/ethdev.c
index 661977b2..be814c58 100644
--- a/wired/ethdev.c
+++ b/wired/ethdev.c
@@ -59,8 +59,8 @@ struct eapol {
 
 static struct l_netlink *rtnl = NULL;
 static struct l_queue *ethdev_list = NULL;
-static char **whitelist_filter;
-static char **blacklist_filter;
+static char **whitelist_filter = NULL;
+static char **blacklist_filter = NULL;
 
 static struct l_io *pae_io;
 
diff --git a/wired/main.c b/wired/main.c
index 1a39a7d5..7e6d26dd 100644
--- a/wired/main.c
+++ b/wired/main.c
@@ -95,6 +95,9 @@ int main(int argc, char *argv[])
 	struct main_opts opts;
 	const char *debugopt = NULL;
 
+	opts.interfaces = NULL;
+	opts.nointerfaces = NULL;
+
 	for (;;) {
 		int opt;