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-rw-r--r--ext/socket/extconf.rb5
1 files changed, 5 insertions, 0 deletions
diff --git a/ext/socket/extconf.rb b/ext/socket/extconf.rb
index ece615865f..2022467f14 100644
--- a/ext/socket/extconf.rb
+++ b/ext/socket/extconf.rb
@@ -140,6 +140,11 @@ main()
int passive, gaierr, inet4 = 0, inet6 = 0;
struct addrinfo hints, *ai, *aitop;
char straddr[INET6_ADDRSTRLEN], strport[16];
+#ifdef _WIN32
+ WSADATA retdata;
+
+ WSAStartup(MAKEWORD(2, 0), &retdata);
+#endif
for (passive = 0; passive <= 1; passive++) {
memset(&hints, 0, sizeof(hints));