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-rw-r--r--src/OpenSSL/SSL.py5
1 files changed, 4 insertions, 1 deletions
diff --git a/src/OpenSSL/SSL.py b/src/OpenSSL/SSL.py
index 230b403..e5fea1e 100644
--- a/src/OpenSSL/SSL.py
+++ b/src/OpenSSL/SSL.py
@@ -146,7 +146,10 @@ OP_NO_SSLv3 = _lib.SSL_OP_NO_SSLv3
OP_NO_TLSv1 = _lib.SSL_OP_NO_TLSv1
OP_NO_TLSv1_1 = _lib.SSL_OP_NO_TLSv1_1
OP_NO_TLSv1_2 = _lib.SSL_OP_NO_TLSv1_2
-OP_NO_TLSv1_3 = _lib.SSL_OP_NO_TLSv1_3
+try:
+ OP_NO_TLSv1_3 = _lib.SSL_OP_NO_TLSv1_3
+except AttributeError:
+ pass
MODE_RELEASE_BUFFERS = _lib.SSL_MODE_RELEASE_BUFFERS