diff --git a/src/dev.rs b/src/dev.rs
index a656604e37f..ed167485ba0 100644
--- a/src/dev.rs
+++ b/src/dev.rs
@@ -29,7 +29,7 @@ pub use actix_http::{Extensions, Payload, PayloadStream, RequestHead, ResponseHe
 pub use actix_router::{Path, ResourceDef, ResourcePath, Url};
 pub use actix_server::Server;
 pub use actix_service::{
-    always_ready, fn_factory, fn_service, forward_ready, Service, Transform,
+    always_ready, fn_factory, fn_service, forward_ready, Service, ServiceFactory, Transform
 };
 
 pub(crate) fn insert_slash(mut patterns: Vec<String>) -> Vec<String> {