--- origsrc/screen-4.6.2/socket.c	2017-10-23 20:32:41.000000000 +0900
+++ src/screen-4.6.2/socket.c	2019-03-09 00:19:12.463762700 +0900
@@ -537,6 +537,9 @@
   xseteuid(real_uid);
   xsetegid(real_gid);
 # endif
+#ifdef __CYGWIN__
+  setsockopt(s, SOL_SOCKET, SO_PEERCRED, NULL, 0);
+#endif
   if (connect(s, (struct sockaddr *) &a, strlen(SockPath) + 2) != -1)
     {
       debug("oooooh! socket already is alive!\n");
@@ -588,6 +591,9 @@
   chown(SockPath, real_uid, real_gid);
 #endif
 #endif /* SOCK_NOT_IN_FS */
+#ifdef __CYGWIN__
+  setsockopt(s, SOL_SOCKET, SO_PEERCRED, NULL, 0);
+#endif
   if (listen(s, 5) == -1)
     Panic(errno, "listen");
 #ifdef F_SETOWN
@@ -628,6 +634,9 @@
       return -1;
     }
 #endif
+#ifdef __CYGWIN__
+  setsockopt(s, SOL_SOCKET, SO_PEERCRED, NULL, 0);
+#endif
   if (connect(s, (struct sockaddr *)&a, strlen(SockPath) + 2) == -1)
     {
       if (err)
@@ -1343,6 +1352,9 @@
   if (stat(sap->sun_path, &st))
     return -1;
   chmod(sap->sun_path, 0);
+#ifdef __CYGWIN__
+  setsockopt(s, SOL_SOCKET, SO_PEERCRED, NULL, 0);
+#endif
   x = connect(s, (struct sockaddr *) sap, len);
   chmod(sap->sun_path, st.st_mode);
   return x;