diff --git a/nitinol.scm b/nitinol.scm
index cb3fe6e..fd706ea 100644
--- a/nitinol.scm
+++ b/nitinol.scm
@@ -1 +1,2 @@
-(load "mithril.scm")
+(unless (equal? (type window) "undefined")
+  (load "mithril.scm"))