diff --git a/bindings/ruby/sfml-graphics/extconf.rb b/bindings/ruby/sfml-graphics/extconf.rb
index 8db2a5619..2b5addbf7 100644
--- a/bindings/ruby/sfml-graphics/extconf.rb
+++ b/bindings/ruby/sfml-graphics/extconf.rb
@@ -23,4 +23,5 @@ require 'mkmf'
 
 dir_config("graphics")
 have_library("sfml-graphics") 
+find_header("main.hpp", "../sfml-system/system")
 create_makefile("sfml/graphics", "graphics")