2 files changed, 5 insertions, 2 deletions
diff --git a/ext/socket/extconf.rb b/ext/socket/extconf.rb
index 4c7d32af3b..28f38140b4 100644
--- a/ext/socket/extconf.rb
+++ b/ext/socket/extconf.rb
@@ -4,11 +4,9 @@ case RUBY_PLATFORM
 when /bccwin32/
   test_func = "WSACleanup"
   have_library("ws2_32", "WSACleanup")
-  have_func("closesocket")
 when /mswin32|mingw/
   test_func = "WSACleanup"
   have_library("wsock32", "WSACleanup")
-  have_func("closesocket")
 when /cygwin/
   test_func = "socket"
 when /beos/
diff --git a/ext/socket/socket.c b/ext/socket/socket.c
index 7c6610c144..68ceb284fe 100644
--- a/ext/socket/socket.c
+++ b/ext/socket/socket.c
@@ -197,6 +197,11 @@ ruby_getaddrinfo__aix(nodename, servname, hints, res)
 #define getaddrinfo(node,serv,hints,res) ruby_getaddrinfo__aix((node),(serv),(hints),(res))
 #endif
 
+#ifdef HAVE_CLOSESOCKET
+#undef close
+#define close closesocket
+#endif
+
 static VALUE
 init_sock(sock, fd)
     VALUE sock;