diff --git a/ntex-service/src/lib.rs b/ntex-service/src/lib.rs
index 7499f629..0e7d5e6e 100644
--- a/ntex-service/src/lib.rs
+++ b/ntex-service/src/lib.rs
@@ -186,7 +186,7 @@ pub trait ServiceFactory {
     /// Errors produced while building a service.
     type InitError;
 
-    /// The future of the `Service` instance.
+    /// The future of the `ServiceFactory` instance.
     type Future: Future<Output = Result<Self::Service, Self::InitError>>;
 
     /// Create and return a new service value asynchronously.
diff --git a/ntex/src/web/middleware/defaultheaders.rs b/ntex/src/web/middleware/defaultheaders.rs
index 46f09c59..c16c9296 100644
--- a/ntex/src/web/middleware/defaultheaders.rs
+++ b/ntex/src/web/middleware/defaultheaders.rs
@@ -30,9 +30,8 @@ use crate::web::dev::{WebRequest, WebResponse};
 /// }
 /// ```
 #[derive(Clone)]
-pub struct DefaultHeaders<E> {
+pub struct DefaultHeaders {
     inner: Rc<Inner>,
-    _t: PhantomData<E>,
 }
 
 struct Inner {
@@ -40,21 +39,20 @@ struct Inner {
     headers: HeaderMap,
 }
 
-impl<E> Default for DefaultHeaders<E> {
+impl Default for DefaultHeaders {
     fn default() -> Self {
         DefaultHeaders {
             inner: Rc::new(Inner {
                 ct: false,
                 headers: HeaderMap::new(),
             }),
-            _t: PhantomData,
         }
     }
 }
 
-impl<E> DefaultHeaders<E> {
+impl DefaultHeaders {
     /// Construct `DefaultHeaders` middleware.
-    pub fn new() -> DefaultHeaders<E> {
+    pub fn new() -> DefaultHeaders {
         DefaultHeaders::default()
     }
 
@@ -92,7 +90,7 @@ impl<E> DefaultHeaders<E> {
     }
 }
 
-impl<S, E> Transform<S> for DefaultHeaders<E>
+impl<S, E> Transform<S> for DefaultHeaders
 where
     S: Service<Request = WebRequest<E>, Response = WebResponse>,
     S::Future: 'static,
diff --git a/ntex/src/web/middleware/logger.rs b/ntex/src/web/middleware/logger.rs
index 2b6310b9..be274f2f 100644
--- a/ntex/src/web/middleware/logger.rs
+++ b/ntex/src/web/middleware/logger.rs
@@ -77,9 +77,8 @@ use crate::web::HttpResponse;
 ///
 /// `%{FOO}e`  os.environ['FOO']
 ///
-pub struct Logger<Err> {
+pub struct Logger {
     inner: Rc<Inner>,
-    _t: PhantomData<Err>,
 }
 
 struct Inner {
@@ -87,15 +86,14 @@ struct Inner {
     exclude: HashSet<String>,
 }
 
-impl<Err> Logger<Err> {
+impl Logger {
     /// Create `Logger` middleware with the specified `format`.
-    pub fn new(format: &str) -> Logger<Err> {
+    pub fn new(format: &str) -> Logger {
         Logger {
             inner: Rc::new(Inner {
                 format: Format::new(format),
                 exclude: HashSet::new(),
             }),
-            _t: PhantomData,
         }
     }
 
@@ -109,7 +107,7 @@ impl<Err> Logger<Err> {
     }
 }
 
-impl<Err> Default for Logger<Err> {
+impl Default for Logger {
     /// Create `Logger` middleware with format:
     ///
     /// ```ignore
@@ -121,12 +119,11 @@ impl<Err> Default for Logger<Err> {
                 format: Format::default(),
                 exclude: HashSet::new(),
             }),
-            _t: PhantomData,
         }
     }
 }
 
-impl<S, Err> Transform<S> for Logger<Err>
+impl<S, Err> Transform<S> for Logger
 where
     S: Service<Request = WebRequest<Err>, Response = WebResponse>,
 {