diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0930d27..7893589 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@ This project follows [semantic versioning](http://semver.org).
 
 - [changed] Using serde instead of rustc_serialize
 - [changed] Updated dependencies
+- [fixed] Fixed wrong address
 
 ### v0.8.1 (2017-05-09)
 
diff --git a/src/crypto.rs b/src/crypto.rs
index 42c7cd9..6ff9d26 100644
--- a/src/crypto.rs
+++ b/src/crypto.rs
@@ -244,7 +244,7 @@ impl Crypto {
         }
     }
 
-    pub fn decrypt(&self, mut buf: &mut [u8], nonce: &[u8], header: &[u8]) -> Result<usize, Error> {
+    pub fn decrypt(&self, buf: &mut [u8], nonce: &[u8], header: &[u8]) -> Result<usize, Error> {
         match *self {
             Crypto::None => Ok(buf.len()),
             Crypto::ChaCha20Poly1305{ref key, ..} => {
@@ -286,7 +286,7 @@ impl Crypto {
         }
     }
 
-    pub fn encrypt(&mut self, mut buf: &mut [u8], mlen: usize, nonce_bytes: &mut [u8], header: &[u8]) -> usize {
+    pub fn encrypt(&mut self, buf: &mut [u8], mlen: usize, nonce_bytes: &mut [u8], header: &[u8]) -> usize {
         match *self {
             Crypto::None => mlen,
             Crypto::ChaCha20Poly1305{ref key, ref mut nonce} => {