diff --git a/ruby/sfml-system/system/System.cpp b/ruby/sfml-system/system/System.cpp
index f536d32d..6536a0ed 100644
--- a/ruby/sfml-system/system/System.cpp
+++ b/ruby/sfml-system/system/System.cpp
@@ -35,6 +35,7 @@ VALUE GetNamespace( void )
 void Init_system( void )
 {
 	globalSFMLNamespace = rb_define_module( "SFML" );
+	rb_define_const(globalSFMLNamespace, "SystemLoaded", Qtrue);
 	Init_Clock();
 	Init_Vector2();
 	Init_Vector3();