diff --git a/net/socket/net_sockif.c b/net/socket/net_sockif.c
index cb7c74ce29a..cb4d62493cb 100644
--- a/net/socket/net_sockif.c
+++ b/net/socket/net_sockif.c
@@ -71,7 +71,10 @@ static const struct sock_intf_s g_ctrl_sockif =
   ctrl_close        /* si_close */
 };
 
-static struct socket_conn_s g_ctrl_conn;
+static struct socket_conn_s g_ctrl_conn =
+{
+  .s_lock = NXRMUTEX_INITIALIZER,
+};
 
 /****************************************************************************
  * Private Functions