diff --git a/src/service/apply.rs b/src/service/apply.rs
index 0c29b81c3..d98e77c8b 100644
--- a/src/service/apply.rs
+++ b/src/service/apply.rs
@@ -7,7 +7,7 @@ use {IntoNewService, NewService, Service};
 pub struct Apply<T, F, R, Req> {
     service: T,
     f: F,
-    r: PhantomData<Fn(Req) -> R>,
+    r: PhantomData<(Req, R)>,
 }
 
 impl<T, F, R, Req> Apply<T, F, R, Req>
diff --git a/src/service/fn_service.rs b/src/service/fn_service.rs
index 07c9df3a8..cf3d6d850 100644
--- a/src/service/fn_service.rs
+++ b/src/service/fn_service.rs
@@ -14,9 +14,7 @@ where
     Fut: IntoFuture<Item = Resp, Error = E>,
 {
     f: F,
-    req: marker::PhantomData<Req>,
-    resp: marker::PhantomData<Resp>,
-    err: marker::PhantomData<E>,
+    _t: marker::PhantomData<(Req, Resp, E)>,
 }
 
 impl<F, Req, Resp, E, Fut> FnService<F, Req, Resp, E, Fut>
@@ -27,9 +25,7 @@ where
     pub fn new(f: F) -> Self {
         FnService {
             f,
-            req: marker::PhantomData,
-            resp: marker::PhantomData,
-            err: marker::PhantomData,
+            _t: marker::PhantomData,
         }
     }
 }
@@ -42,9 +38,7 @@ where
     fn clone(&self) -> Self {
         FnService {
             f: self.f.clone(),
-            req: marker::PhantomData,
-            resp: marker::PhantomData,
-            err: marker::PhantomData,
+            _t: marker::PhantomData,
         }
     }
 }
@@ -84,10 +78,7 @@ where
     Fut: IntoFuture<Item = Resp, Error = Err>,
 {
     f: F,
-    req: marker::PhantomData<Req>,
-    resp: marker::PhantomData<Resp>,
-    err: marker::PhantomData<Err>,
-    ierr: marker::PhantomData<IErr>,
+    _t: marker::PhantomData<(Req, Resp, Err, IErr)>,
 }
 
 impl<F, Req, Resp, Err, IErr, Fut> FnNewService<F, Req, Resp, Err, IErr, Fut>
@@ -98,10 +89,7 @@ where
     pub fn new(f: F) -> Self {
         FnNewService {
             f,
-            req: marker::PhantomData,
-            resp: marker::PhantomData,
-            err: marker::PhantomData,
-            ierr: marker::PhantomData,
+            _t: marker::PhantomData,
         }
     }
 }
diff --git a/src/service/fn_state_service.rs b/src/service/fn_state_service.rs
index 8b44ce448..2366baa25 100644
--- a/src/service/fn_state_service.rs
+++ b/src/service/fn_state_service.rs
@@ -12,9 +12,7 @@ where
 {
     f: F,
     state: S,
-    req: marker::PhantomData<Req>,
-    resp: marker::PhantomData<Resp>,
-    err: marker::PhantomData<Err>,
+    _t: marker::PhantomData<(Req, Resp, Err)>,
 }
 
 impl<S, F, Req, Resp, Err, Fut> FnStateService<S, F, Req, Resp, Err, Fut>
@@ -26,9 +24,7 @@ where
         FnStateService {
             f,
             state,
-            req: marker::PhantomData,
-            resp: marker::PhantomData,
-            err: marker::PhantomData,
+            _t: marker::PhantomData,
         }
     }
 }
@@ -43,9 +39,7 @@ where
         FnStateService {
             f: self.f.clone(),
             state: self.state.clone(),
-            req: marker::PhantomData,
-            resp: marker::PhantomData,
-            err: marker::PhantomData,
+            _t: marker::PhantomData,
         }
     }
 }
@@ -73,13 +67,7 @@ where
 pub struct FnStateNewService<S, F1, F2, Req, Resp, Err1, Err2, Fut1, Fut2> {
     f: F1,
     state: F2,
-    s: marker::PhantomData<S>,
-    req: marker::PhantomData<Req>,
-    resp: marker::PhantomData<Resp>,
-    err1: marker::PhantomData<Err1>,
-    err2: marker::PhantomData<Err2>,
-    fut1: marker::PhantomData<Fut1>,
-    fut2: marker::PhantomData<Fut2>,
+    _t: marker::PhantomData<(S, Req, Resp, Err1, Err2, Fut1, Fut2)>,
 }
 
 impl<S, F1, F2, Req, Resp, Err1, Err2, Fut1, Fut2>
@@ -89,13 +77,7 @@ impl<S, F1, F2, Req, Resp, Err1, Err2, Fut1, Fut2>
         FnStateNewService {
             f,
             state,
-            s: marker::PhantomData,
-            req: marker::PhantomData,
-            resp: marker::PhantomData,
-            err1: marker::PhantomData,
-            err2: marker::PhantomData,
-            fut1: marker::PhantomData,
-            fut2: marker::PhantomData,
+            _t: marker::PhantomData,
         }
     }
 }