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-rw-r--r--ext/socket/extconf.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/socket/extconf.rb b/ext/socket/extconf.rb
index 6469535ca3..41b715e0af 100644
--- a/ext/socket/extconf.rb
+++ b/ext/socket/extconf.rb
@@ -6,7 +6,7 @@ when /bccwin32/
have_library("ws2_32", "WSACleanup")
when /mswin32|mingw/
test_func = "WSACleanup"
- if /USE_WINSOCK2/ =~ $CPPFLAGS
+ if with_config("winsock2")
have_library("ws2_32", "WSACleanup")
else
have_library("wsock32", "WSACleanup")