diff --git a/openssl/src/error.rs b/openssl/src/error.rs
index 8865a40a999e7b4fffabda021e2e386c69e21a4d..3d2cfac65e57df31c4951d74978264ab43eadb8d 100644
--- a/openssl/src/error.rs
+++ b/openssl/src/error.rs
@@ -15,6 +15,7 @@
 //!     Err(e) => println!("Parsing Error: {:?}", e),
 //! }
 //! ```
+use cfg_if::cfg_if;
 use libc::{c_char, c_int, c_ulong};
 use std::borrow::Cow;
 use std::error;