diff --git a/modules/packet_proxy/packet_proxy_linux.go b/modules/packet_proxy/packet_proxy_linux.go
index e69fe485..9a40fcff 100644
--- a/modules/packet_proxy/packet_proxy_linux.go
+++ b/modules/packet_proxy/packet_proxy_linux.go
@@ -16,15 +16,13 @@ import (
 	"github.com/evilsocket/islazy/fs"
 )
 
-type hookFunc func(q *nfqueue.Nfqueue, a nfqueue.Attribute) int
-
 type PacketProxy struct {
 	session.SessionModule
 	chainName  string
 	rule       string
 	queue      *nfqueue.Nfqueue
 	queueNum   int
-	queueCb    hookFunc
+	queueCb    func(q *nfqueue.Nfqueue, a nfqueue.Attribute) int
 	pluginPath string
 	plugin     *plugin.Plugin
 }
@@ -151,7 +149,7 @@ func (mod *PacketProxy) Configure() (err error) {
 			return
 		} else if sym, err = mod.plugin.Lookup("OnPacket"); err != nil {
 			return
-		} else if mod.queueCb, ok = sym.(hookFunc); !ok {
+		} else if mod.queueCb, ok = sym.(func(q *nfqueue.Nfqueue, a nfqueue.Attribute) int); !ok {
 			return fmt.Errorf("Symbol OnPacket is not a valid callback function.")
 		}