diff --git a/openssl/src/lib.rs b/openssl/src/lib.rs
index aafbac76..d12af41c 100644
--- a/openssl/src/lib.rs
+++ b/openssl/src/lib.rs
@@ -1,5 +1,4 @@
 #![doc(html_root_url="https://sfackler.github.io/rust-openssl/doc/v0.7.14")]
-#![cfg_attr(feature = "nightly", feature(const_fn))]
 
 #[macro_use]
 extern crate bitflags;