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-rw-r--r--Modules/socketmodule.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/Modules/socketmodule.c b/Modules/socketmodule.c
index 50962c4..ed1043c 100644
--- a/Modules/socketmodule.c
+++ b/Modules/socketmodule.c
@@ -86,6 +86,8 @@ Local naming conventions:
*/
#ifdef __APPLE__
+// Issue #35569: Expose RFC 3542 socket options.
+#define __APPLE_USE_RFC_3542 1
#include <AvailabilityMacros.h>
/* for getaddrinfo thread safety test on old versions of OS X */
#ifndef MAC_OS_X_VERSION_10_5