diff --git a/src/lib.rs b/src/lib.rs
index 154426b..ff9d4fe 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -70,7 +70,10 @@ use std::io::{self, BufRead};
 /// let data = Data { byte: 0x1F, word: 0xABCD, big: !0 };
 /// data.hash(&mut adler);
 ///
+/// #[cfg(target_endian = "little")]
 /// assert_eq!(adler.checksum(), 0x33410990);
+/// #[cfg(target_endian = "big")]
+/// assert_eq!(adler.checksum(), 0x331F0990);
 /// ```
 ///
 /// [`new`]: #method.new