diff --git a/ChangeLog b/ChangeLog
index 54e5d388c2..6d4adf82ec 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Thu Apr 30 16:39:44 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* ext/socket/ipsocket.c (init_inetsock_internal): preserve errno
+	  before other library calls and use rb_syserr_fail.
+	  [ruby-core:68531] [Bug #10975]
+
 Thu Apr 30 16:22:16 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* parse.y (lambda): push and reset cmdarg_stack in lambda body.
diff --git a/ext/socket/ipsocket.c b/ext/socket/ipsocket.c
index c84023daa2..9b32d082dd 100644
--- a/ext/socket/ipsocket.c
+++ b/ext/socket/ipsocket.c
@@ -41,6 +41,7 @@ inetsock_cleanup(struct inetsock_arg *arg)
 static VALUE
 init_inetsock_internal(struct inetsock_arg *arg)
 {
+    int error = 0;
     int type = arg->type;
     struct addrinfo *res, *lres;
     int fd, status = 0, local = 0;
@@ -80,6 +81,7 @@ init_inetsock_internal(struct inetsock_arg *arg)
 	syscall = "socket(2)";
 	fd = status;
 	if (fd < 0) {
+	    error = errno;
 	    continue;
 	}
 	arg->fd = fd;
@@ -107,6 +109,7 @@ init_inetsock_internal(struct inetsock_arg *arg)
 	}
 
 	if (status < 0) {
+	    error = errno;
 	    close(fd);
 	    arg->fd = fd = -1;
 	    continue;
@@ -124,7 +127,7 @@ init_inetsock_internal(struct inetsock_arg *arg)
 	    port = arg->remote.serv;
 	}
 
-	rsock_sys_fail_host_port(syscall, host, port);
+	rsock_syserr_fail_host_port(error, mesg, host, port);
     }
 
     arg->fd = -1;
@@ -132,8 +135,9 @@ init_inetsock_internal(struct inetsock_arg *arg)
     if (type == INET_SERVER) {
 	status = listen(fd, SOMAXCONN);
 	if (status < 0) {
+	    error = errno;
 	    close(fd);
-            rb_sys_fail("listen(2)");
+	    rb_syserr_fail(error, "listen(2)");
 	}
     }