diff --git a/ext/socket/init.c b/ext/socket/init.c
index 5ca0cdbb1d044c..10459710c249b0 100644
--- a/ext/socket/init.c
+++ b/ext/socket/init.c
@@ -50,10 +50,14 @@ rsock_raise_socket_error(const char *reason, int error)
     VALUE msg = rb_sprintf("%s: ", reason);
     if (!enc) enc = rb_default_internal_encoding();
     rb_str_concat(msg, rb_w32_conv_from_wchar(gai_strerrorW(error), enc));
-    rb_exc_raise(rb_exc_new_str(rb_eSocket, msg));
 #else
-    rb_raise(rb_eSocket, "%s: %s", reason, gai_strerror(error));
+    VALUE msg = rb_sprintf("%s: %s", reason, gai_strerror(error));
 #endif
+
+    StringValue(msg);
+    VALUE self = rb_class_new_instance(1, &msg, rb_eResolution);
+    rb_ivar_set(self, id_error_code, INT2NUM(error));
+    rb_exc_raise(self);
 }
 
 #if defined __APPLE__
diff --git a/test/fiber/test_address_resolve.rb b/test/fiber/test_address_resolve.rb
index 12223bcc06fa8b..09c8db6049fa9d 100644
--- a/test/fiber/test_address_resolve.rb
+++ b/test/fiber/test_address_resolve.rb
@@ -179,7 +179,7 @@ def test_addrinfo_getaddrinfo_non_existing_domain_blocking
       Fiber.set_scheduler scheduler
 
       Fiber.schedule do
-        assert_raise(SocketError) {
+        assert_raise(Socket::ResolutionError) {
           Addrinfo.getaddrinfo("non-existing-domain.abc", nil)
         }
       end
diff --git a/test/socket/test_addrinfo.rb b/test/socket/test_addrinfo.rb
index 832a1f8d05bcb9..c61764d76d63b8 100644
--- a/test/socket/test_addrinfo.rb
+++ b/test/socket/test_addrinfo.rb
@@ -103,7 +103,7 @@ def test_addrinfo_predicates
   end
 
   def test_error_message
-    e = assert_raise_with_message(SocketError, /getaddrinfo/) do
+    e = assert_raise_with_message(Socket::ResolutionError, /getaddrinfo/) do
       Addrinfo.ip("...")
     end
     m = e.message
@@ -357,7 +357,7 @@ def test_family_addrinfo
     ai = Addrinfo.unix("/testdir/sock").family_addrinfo("/testdir/sock2")
     assert_equal("/testdir/sock2", ai.unix_path)
     assert_equal(Socket::SOCK_STREAM, ai.socktype)
-    assert_raise(SocketError) { Addrinfo.tcp("0.0.0.0", 4649).family_addrinfo("::1", 80) }
+    assert_raise(Socket::ResolutionError) { Addrinfo.tcp("0.0.0.0", 4649).family_addrinfo("::1", 80) }
   end
 
   def random_port
diff --git a/test/socket/test_socket.rb b/test/socket/test_socket.rb
index 56457235580c54..01f790ea35578c 100644
--- a/test/socket/test_socket.rb
+++ b/test/socket/test_socket.rb
@@ -91,20 +91,20 @@ def test_bind
 
   def test_getaddrinfo
     # This should not send a DNS query because AF_UNIX.
-    assert_raise(SocketError) { Socket.getaddrinfo("www.kame.net", 80, "AF_UNIX") }
+    assert_raise(Socket::ResolutionError) { Socket.getaddrinfo("www.kame.net", 80, "AF_UNIX") }
   end
 
   def test_getaddrinfo_raises_no_errors_on_port_argument_of_0 # [ruby-core:29427]
     assert_nothing_raised('[ruby-core:29427]'){ Socket.getaddrinfo('localhost', 0, Socket::AF_INET, Socket::SOCK_STREAM, nil, Socket::AI_CANONNAME) }
     assert_nothing_raised('[ruby-core:29427]'){ Socket.getaddrinfo('localhost', '0', Socket::AF_INET, Socket::SOCK_STREAM, nil, Socket::AI_CANONNAME) }
     assert_nothing_raised('[ruby-core:29427]'){ Socket.getaddrinfo('localhost', '00', Socket::AF_INET, Socket::SOCK_STREAM, nil, Socket::AI_CANONNAME) }
-    assert_raise(SocketError, '[ruby-core:29427]'){ Socket.getaddrinfo(nil, nil, Socket::AF_INET, Socket::SOCK_STREAM, nil, Socket::AI_CANONNAME) }
+    assert_raise(Socket::ResolutionError, '[ruby-core:29427]'){ Socket.getaddrinfo(nil, nil, Socket::AF_INET, Socket::SOCK_STREAM, nil, Socket::AI_CANONNAME) }
     assert_nothing_raised('[ruby-core:29427]'){ TCPServer.open('localhost', 0) {} }
   end
 
 
   def test_getnameinfo
-    assert_raise(SocketError) { Socket.getnameinfo(["AF_UNIX", 80, "0.0.0.0"]) }
+    assert_raise(Socket::ResolutionError) { Socket.getnameinfo(["AF_UNIX", 80, "0.0.0.0"]) }
     assert_raise(ArgumentError) {Socket.getnameinfo(["AF_INET", "http\0", "example.net"])}
     assert_raise(ArgumentError) {Socket.getnameinfo(["AF_INET", "http", "example.net\0"])}
   end
@@ -770,4 +770,12 @@ def test_udp_recvmsg_truncation
     s2.close
   end
 
+  def test_resolurion_error_error_code
+    begin
+      Socket.getaddrinfo("www.kame.net", 80, "AF_UNIX")
+    rescue => e
+      assert_equal(e.error_code, Socket::EAI_FAMILY)
+    end
+  end
+
 end if defined?(Socket)