diff --git a/lib/core/libimagerror/src/str.rs b/lib/core/libimagerror/src/str.rs
index 66105d61..745a1f4b 100644
--- a/lib/core/libimagerror/src/str.rs
+++ b/lib/core/libimagerror/src/str.rs
@@ -25,7 +25,7 @@ pub trait ErrFromStr<T> {
 
 impl<T, E: Error> ErrFromStr<T> for Result<T, E> {
     fn err_from_str(self) -> Result<T, String> {
-        self.map_err(|e| format!("{}", e.description()))
+        self.map_err(|e| e.description().to_string())
     }
 }
 
diff --git a/lib/etc/libimagutil/src/key_value_split.rs b/lib/etc/libimagutil/src/key_value_split.rs
index b1427dc1..ce9989ab 100644
--- a/lib/etc/libimagutil/src/key_value_split.rs
+++ b/lib/etc/libimagutil/src/key_value_split.rs
@@ -33,7 +33,7 @@ pub struct KeyValue<K, V> {
 impl<K, V> KeyValue<K, V> {
 
     pub fn new(k: K, v: V) -> KeyValue<K, V> {
-        KeyValue { k: k, v: v }
+        KeyValue { k, v }
     }
 
     pub fn key(&self) -> &K {