diff --git a/ntex-server/src/server.rs b/ntex-server/src/server.rs
index c9d8a44f..5f860b40 100644
--- a/ntex-server/src/server.rs
+++ b/ntex-server/src/server.rs
@@ -38,7 +38,7 @@ impl<T> Server<T> {
     }
 
     /// Send item to worker pool
-    pub fn process(&mut self, item: T) -> Result<(), T> {
+    pub fn process(&self, item: T) -> Result<(), T> {
         if self.shared.paused.load(Ordering::Acquire) {
             Err(item)
         } else if let Err(e) = self.cmd.try_send(ServerCommand::Item(item)) {