diff --git a/server_handler.go b/server_handler.go
index 3ed7127..cd9f06a 100644
--- a/server_handler.go
+++ b/server_handler.go
@@ -13,7 +13,5 @@ type ServerHandler interface {
 
 	Handle(conn net.Conn, stopChan <-chan struct{}, doneChan chan<- struct{})
 
-	IsClientDisconnect(err error) bool
-
 	Validate()
 }
diff --git a/server_handlers.go b/server_handlers.go
index fe7e2b7..6a2e46c 100644
--- a/server_handlers.go
+++ b/server_handlers.go
@@ -2,7 +2,6 @@ package server
 
 import (
 	"errors"
-	"io"
 	"log"
 	"net"
 )
@@ -30,10 +29,6 @@ func (sh *ServerHandlers) Handle(conn net.Conn, stopChan <-chan struct{}, doneCh
 	log.Printf("Server.Handle")
 }
 
-func (sh *ServerHandlers) IsClientDisconnect(err error) bool {
-	return err == io.ErrUnexpectedEOF || err == io.EOF
-}
-
 func (sh *ServerHandlers) Validate() {
 
 }
diff --git a/util.go b/util.go
new file mode 100644
index 0000000..ecb2790
--- /dev/null
+++ b/util.go
@@ -0,0 +1,7 @@
+package server
+
+import "io"
+
+func IsClientDisconnect(err error) bool {
+	return err == io.ErrUnexpectedEOF || err == io.EOF
+}