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-rw-r--r--ext/openssl/extconf.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/ext/openssl/extconf.rb b/ext/openssl/extconf.rb
index bc3e4d3a21..ef21bd5f43 100644
--- a/ext/openssl/extconf.rb
+++ b/ext/openssl/extconf.rb
@@ -27,6 +27,7 @@ if with_config("debug") or enable_config("debug")
end
$defs.push("-D""OPENSSL_SUPPRESS_DEPRECATED")
+have_func("rb_io_descriptor")
have_func("rb_io_maybe_wait(0, Qnil, Qnil, Qnil)", "ruby/io.h") # Ruby 3.1
Logging::message "=== Checking for system dependent stuff... ===\n"