diff --git a/gsock.cpp b/gsock.cpp
index 79dec50..324d662 100644
--- a/gsock.cpp
+++ b/gsock.cpp
@@ -217,7 +217,7 @@ int sock::setrecvtime(int Second)
 }
 
 //forgive me, but writing code in hospital is really not a good experience.
-typedef int (*_sock_getname_callback_t)(int,sockaddr*,socklen_t*);
+using _sock_getname_callback_t = decltype(getsockname);
 
 static int _sock_getname_call(int sfd,std::string& ip,int& port,_sock_getname_callback_t fn)
 {
diff --git a/gsock.h b/gsock.h
index 6b8586a..bbcfa83 100644
--- a/gsock.h
+++ b/gsock.h
@@ -15,11 +15,11 @@ protected:
     vsock();
     vsock(const vsock&)=delete;
     vsock& operator = (const vsock&)=delete;
-    vsock(vsock&&);
-    vsock& operator = (vsock&&);
+    vsock(vsock&& v);
+    vsock& operator = (vsock&& v);
     ~vsock();
     
-    vsock(int);
+    //vsock(int);
     
 	struct _impl;
 	_impl* _vp;