diff --git a/openssl/src/ssl/mod.rs b/openssl/src/ssl/mod.rs
index ef1a26d5..9e17ae60 100644
--- a/openssl/src/ssl/mod.rs
+++ b/openssl/src/ssl/mod.rs
@@ -71,7 +71,7 @@
 //! }
 //! ```
 use ffi;
-use foreign_types::{ForeignType, ForeignTypeRef};
+use foreign_types::{ForeignType, ForeignTypeRef, Opaque};
 use libc::{c_int, c_void, c_long, c_ulong};
 use libc::{c_uchar, c_uint};
 use std::any::Any;
@@ -107,7 +107,6 @@ use verify::X509VerifyParamRef;
 use pkey::PKeyRef;
 use error::ErrorStack;
 use ex_data::Index;
-use util::Opaque;
 use stack::{Stack, StackRef};
 use ssl::bio::BioMethod;
 use ssl::callbacks::*;
diff --git a/openssl/src/stack.rs b/openssl/src/stack.rs
index f869bdb4..d20d95f7 100644
--- a/openssl/src/stack.rs
+++ b/openssl/src/stack.rs
@@ -1,4 +1,4 @@
-use foreign_types::{ForeignTypeRef, ForeignType};
+use foreign_types::{ForeignTypeRef, ForeignType, Opaque};
 use libc::c_int;
 use std::borrow::Borrow;
 use std::convert::AsRef;
@@ -11,8 +11,6 @@ use {cvt, cvt_p};
 use error::ErrorStack;
 use std::ops::{Deref, DerefMut, Index, IndexMut};
 
-use util::Opaque;
-
 #[cfg(ossl10x)]
 use ffi::{sk_pop as OPENSSL_sk_pop, sk_free as OPENSSL_sk_free, sk_num as OPENSSL_sk_num,
           sk_value as OPENSSL_sk_value, _STACK as OPENSSL_STACK,
diff --git a/openssl/src/symm.rs b/openssl/src/symm.rs
index 6aed21c5..f593126a 100644
--- a/openssl/src/symm.rs
+++ b/openssl/src/symm.rs
@@ -358,10 +358,8 @@ impl Drop for Crypter {
     }
 }
 
-#[doc = /**
- * Encrypts data, using the specified crypter type in encrypt mode with the
- * specified key and iv; returns the resulting (encrypted) data.
- */]
+/// Encrypts data, using the specified crypter type in encrypt mode with the
+/// specified key and iv; returns the resulting (encrypted) data.
 pub fn encrypt(
     t: Cipher,
     key: &[u8],
@@ -371,10 +369,8 @@ pub fn encrypt(
     cipher(t, Mode::Encrypt, key, iv, data)
 }
 
-#[doc = /**
- * Decrypts data, using the specified crypter type in decrypt mode with the
- * specified key and iv; returns the resulting (decrypted) data.
- */]
+/// Decrypts data, using the specified crypter type in decrypt mode with the
+/// specified key and iv; returns the resulting (decrypted) data.
 pub fn decrypt(
     t: Cipher,
     key: &[u8],
diff --git a/openssl/src/util.rs b/openssl/src/util.rs
index 58abd9ec..1093b491 100644
--- a/openssl/src/util.rs
+++ b/openssl/src/util.rs
@@ -91,8 +91,3 @@ where
         }
     }
 }
-
-/// This is intended to be used as the inner type for `FooRef` types converted from raw C pointers.
-/// It has an `UnsafeCell` internally to inform the compiler about aliasability and doesn't
-/// implement `Copy`, so it can't be dereferenced.
-pub struct Opaque(UnsafeCell<()>);