diff --git a/src/lib.rs b/src/lib.rs
index 7855923..1529927 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -32,6 +32,10 @@
 //! hatred of the Daleks.  Rusty destroys the other Daleks and departs the
 //! ship, determined to track down and bring an end to the Dalek race.
 
+#[cfg(test)]
+#[macro_use]
+extern crate std;
+
 #[cfg(test)]
 extern crate test;