diff --git a/src/ioslaves/file/sharefd_p.h b/src/ioslaves/file/sharefd_p.h
index 6d316576..d169e408 100644
--- a/src/ioslaves/file/sharefd_p.h
+++ b/src/ioslaves/file/sharefd_p.h
@@ -1,98 +1,98 @@
 /***
     Copyright (C) 2017 by Chinmoy Ranjan Pradhan <chinmoyrp65@gmail.com>
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Lesser General Public
     License as published by the Free Software Foundation; either
     version 2.1 of the License, or (at your option) version 3, or any
     later version accepted by the membership of KDE e.V. (or its
     successor approved by the membership of KDE e.V.), which shall
     act as a proxy defined in Section 6 of version 3 of the license.
 
     This library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Lesser General Public License for more details.
 
     You should have received a copy of the GNU Lesser General Public
     License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 ***/
 
 #include <sys/un.h>
 #include <iostream>
 #include <unistd.h>
 #include <sys/socket.h>
 #include <string.h>
 
 // fix SOCK_NONBLOCK for e.g. macOS
 #ifndef SOCK_NONBLOCK
 #include <fcntl.h>
 #define SOCK_NONBLOCK O_NONBLOCK
 #endif
 
 class SocketAddress
 {
     const sockaddr_un addr;
 
 public:
     SocketAddress(const std::string &path)
         : addr(make_address(path))
     {
     }
 
     int length() const
     {
-        return sizeof addr;
+        return offsetof(struct sockaddr_un, sun_path) + strlen(addr.sun_path) + 1;
     }
     const sockaddr *address() const
     {
         return addr.sun_path[0] ? reinterpret_cast<const sockaddr*>(&addr) : nullptr;
     }
 
 private:
     static sockaddr_un make_address(const std::string& path)
     {
         sockaddr_un a;
         memset(&a, 0, sizeof a);
         a.sun_family = AF_UNIX;
         const size_t pathSize = path.size();
         if (pathSize > 0 && pathSize < sizeof(a.sun_path) - 1) {
             memcpy(a.sun_path, path.c_str(), pathSize + 1);
         }
         return a;
     }
 };
 
 class FDMessageHeader
 {
     char io_buf[2];
     char cmsg_buf[CMSG_SPACE(sizeof(int))];
     iovec io;
     msghdr msg;
 
 public:
     FDMessageHeader()
         : io_buf{0}
         , cmsg_buf{0}
     {
         memset(&io, 0, sizeof io);
         io.iov_base = &io_buf;
         io.iov_len = sizeof io_buf;
 
         memset(&msg, 0, sizeof msg);
         msg.msg_iov = &io;
         msg.msg_iovlen = 1;
         msg.msg_control = &cmsg_buf;
         msg.msg_controllen = sizeof cmsg_buf;
     }
 
     msghdr *message()
     {
         return &msg;
     }
 
     cmsghdr *cmsgHeader()
     {
         return CMSG_FIRSTHDR(&msg);
     }
 };