diff --git a/Modules/socketmodule.c b/Modules/socketmodule.c
@@ -305,6 +305,70 @@ if_indextoname(index) -- return the corresponding interface name\n\
/* Provides the IsWindows7SP1OrGreater() function */
#include <VersionHelpers.h>

#endif

#include <stddef.h>
@@ -7883,5 +7947,11 @@ PyInit__socket(void)
#if defined(USE_GETHOSTBYNAME_LOCK) || defined(USE_GETADDRINFO_LOCK)
    netdb_lock = PyThread_allocate_lock();
#endif
    return m;
}