diff --git a/src/ttynvt.c b/src/ttynvt.c
index d7abe43..c3367e9 100644
--- a/src/ttynvt.c
+++ b/src/ttynvt.c
@@ -1204,6 +1204,7 @@ static void ttynvt_release(fuse_req_t req, struct fuse_file_info *info)
         fuse_pollhandle_destroy(tty->ph);
 
     _ttynvt_ctx_destroy(tty);
+    ptty = NULL;
 
     nvt_log(LOG_INFO, "Disconnected from server: %s\n", ttynvt_param.server);