diff --git a/CHANGELOG.md b/CHANGELOG.md
index 80cd045..43f9b85 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -31,6 +31,7 @@ Versions with only mechanical changes will be omitted from the following list.
 * Use markdown footnotes on the `strftime` docs page (@qudlibetor #359)
 * Migrate from `try!` -> `?` (question mark) because it is now emitting
   deprecation warnings and has been stable since rustc 1.13.0
+* Deny dead code
 
 ## 0.4.9
 
diff --git a/src/lib.rs b/src/lib.rs
index bf3c151..ef76a7f 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -386,6 +386,7 @@
 #![cfg_attr(feature = "bench", feature(test))] // lib stability features as per RFC #507
 #![deny(missing_docs)]
 #![deny(missing_debug_implementations)]
+#![deny(dead_code)]
 
 #![cfg_attr(not(any(feature = "std", test)), no_std)]
 
@@ -465,8 +466,6 @@ macro_rules! try_opt {
     ($e:expr) => (match $e { Some(v) => v, None => return None })
 }
 
-const EPOCH_NUM_DAYS_FROM_CE: i32 = 719_163;
-
 mod div;
 #[cfg(not(feature="clock"))]
 mod oldtime;