diff --git a/src/lib.rs b/src/lib.rs
index 308973b..cd0d60f 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,6 +1,6 @@
 #![no_std]
 
-#[macro_use]
+#[cfg_attr(test, macro_use)]
 extern crate alloc;
 extern crate byteorder;
 #[macro_use]