diff --git a/lib/asciinema/streaming/live_stream_server.ex b/lib/asciinema/streaming/live_stream_server.ex
index 21b96a03e..5f9a86016 100644
--- a/lib/asciinema/streaming/live_stream_server.ex
+++ b/lib/asciinema/streaming/live_stream_server.ex
@@ -160,14 +160,19 @@ defmodule Asciinema.Streaming.LiveStreamServer do
 
   def handle_info(:update_stream, state) do
     Process.send_after(self(), :update_stream, @update_stream_interval)
-    {cols, rows} = state.vt_size
 
     stream =
-      Streaming.update_live_stream(state.stream,
-        current_viewer_count: state.viewer_count,
-        cols: cols,
-        rows: rows
-      )
+      case state.vt_size do
+        {cols, rows} ->
+          Streaming.update_live_stream(state.stream,
+            current_viewer_count: state.viewer_count,
+            cols: cols,
+            rows: rows
+          )
+
+        nil ->
+          state.stream
+      end
 
     {:noreply, %{state | stream: stream}}
   end