diff --git a/ChangeLog b/ChangeLog
index 73dde98274..32ca122a45 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,11 @@
+Sat Apr  6 13:13:39 2013  Tanaka Akira  <akr@fsij.org>
+
+	* ext/socket/socket.c (rsock_sys_fail_path): Use rb_str_inspect only
+	  for String to avoid SEGV.
+
 Sat Apr  6 12:40:16 2013  Tanaka Akira  <akr@fsij.org>
 
-	* ext/socket/rubysocket.h (rsock_sys_fail_host_port) Wrap by NORETURN.
+	* ext/socket/rubysocket.h (rsock_sys_fail_host_port): Wrap by NORETURN.
 	  (rsock_sys_fail_path): Ditto.
 	  (rsock_sys_fail_sockaddr): Ditto.
 
diff --git a/ext/socket/socket.c b/ext/socket/socket.c
index be7bd62236..3ee725d8b5 100644
--- a/ext/socket/socket.c
+++ b/ext/socket/socket.c
@@ -29,16 +29,21 @@ void
 rsock_sys_fail_path(const char *mesg, VALUE path)
 {
     VALUE message;
-    if (memchr(RSTRING_PTR(path), '\0', RSTRING_LEN(path))) {
-        path = rb_str_inspect(path);
-        message = rb_sprintf("%s for %s", mesg,
-                StringValueCStr(path));
+    if (RB_TYPE_P(path, T_STRING)) {
+        if (memchr(RSTRING_PTR(path), '\0', RSTRING_LEN(path))) {
+            path = rb_str_inspect(path);
+            message = rb_sprintf("%s for %s", mesg,
+                    StringValueCStr(path));
+        }
+        else {
+            message = rb_sprintf("%s for \"%s\"", mesg,
+                    StringValueCStr(path));
+        }
+        rb_sys_fail_str(message);
     }
     else {
-        message = rb_sprintf("%s for \"%s\"", mesg,
-                StringValueCStr(path));
+        rb_sys_fail(mesg);
     }
-    rb_sys_fail_str(message);
 }
 
 void