diff --git a/src/hmac.rs b/src/hmac.rs
index 3ee2211..7f23d7e 100644
--- a/src/hmac.rs
+++ b/src/hmac.rs
@@ -100,8 +100,8 @@ impl<T: Hash> HmacEngine<T> {
     /// "inner" and "outer" engines.
     pub fn from_inner_engines(iengine: T::Engine, oengine: T::Engine) -> HmacEngine<T> {
         HmacEngine {
-            iengine: iengine,
-            oengine: oengine,
+            iengine,
+            oengine,
         }
     }
 }
diff --git a/src/sha256.rs b/src/sha256.rs
index 7cc8dcd..d496962 100644
--- a/src/sha256.rs
+++ b/src/sha256.rs
@@ -246,7 +246,7 @@ impl HashEngine {
         HashEngine {
             buffer: [0; BLOCK_SIZE],
             h: ret,
-            length: length,
+            length,
         }
     }
 
diff --git a/src/siphash24.rs b/src/siphash24.rs
index e26f156..4ac7f40 100644
--- a/src/siphash24.rs
+++ b/src/siphash24.rs
@@ -91,8 +91,8 @@ impl HashEngine {
     /// Create a new SipHash24 engine with keys.
     pub fn with_keys(k0: u64, k1: u64) -> HashEngine {
         HashEngine {
-            k0: k0,
-            k1: k1,
+            k0,
+            k1,
             length: 0,
             state: State {
                 v0: k0 ^ 0x736f6d6570736575,