diff --git a/lib/mittsu/renderers/glfw_window.rb b/lib/mittsu/renderers/glfw_window.rb
index c77f3f46..2658f8fe 100644
--- a/lib/mittsu/renderers/glfw_window.rb
+++ b/lib/mittsu/renderers/glfw_window.rb
@@ -6,8 +6,6 @@
 glfw_lib = Mittsu::GLFWLib.discover
 ::GLFW.load_lib(ENV["MITTSU_LIBGLFW_FILE"] || glfw_lib.file, ENV["MITTSU_LIBGLFW_PATH"] || glfw_lib.path) unless Mittsu.test?
 
-include GLFW
-
 module Mittsu
   module GLFW
     class Window