diff --git a/src/win/tty.c b/src/win/tty.c
index af828cf8..f0a00e1f 100644
--- a/src/win/tty.c
+++ b/src/win/tty.c
@@ -527,11 +527,16 @@ void uv_process_tty_read_raw_req(uv_loop_t* loop, uv_tty_t* handle,
       /* way that matters to libuv. */
       if (handle->last_input_record.EventType == WINDOW_BUFFER_SIZE_EVENT) {
         CONSOLE_SCREEN_BUFFER_INFO info;
-        if (uv_tty_output_handle == INVALID_HANDLE_VALUE)
-          continue;
-        if (!GetConsoleScreenBufferInfo(uv_tty_output_handle, &info))
-          continue;
-        uv_tty_update_virtual_window(&info);
+
+        EnterCriticalSection(&uv_tty_output_lock);
+
+        if (uv_tty_output_handle != INVALID_HANDLE_VALUE &&
+            GetConsoleScreenBufferInfo(uv_tty_output_handle, &info)) {
+          uv_tty_update_virtual_window(&info);
+        }
+
+        LeaveCriticalSection(&uv_tty_output_lock);
+
         continue;
       }