diff --git a/jtserv/jtserv.rb b/jtserv/jtserv.rb
index 6ff0013..03333be 100755
--- a/jtserv/jtserv.rb
+++ b/jtserv/jtserv.rb
@@ -443,6 +443,7 @@
   ws_conn.onopen do
     # First, clean up idling connections
     connections.each do |conn, info|
+      next if !info || !info["openat"]	# For avoidance of exception..
       if TIMEOUT < Time.now - (info["stamp"]||info["openat"])
         STDERR.printf("Force Close client %s after long idle\n", conn)
         conn.close