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-rw-r--r--src/cryptography/hazmat/backends/openssl/backend.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/cryptography/hazmat/backends/openssl/backend.py b/src/cryptography/hazmat/backends/openssl/backend.py
index ec692926..06801bc9 100644
--- a/src/cryptography/hazmat/backends/openssl/backend.py
+++ b/src/cryptography/hazmat/backends/openssl/backend.py
@@ -165,7 +165,7 @@ def _encode_subject_alt_name(backend, san):
raise NotImplementedError("Only DNSNames are supported right now")
res = backend._lib.sk_GENERAL_NAME_push(general_names, gn)
- assert res >= 0
+ assert res != 0
pp = backend._ffi.new("unsigned char **")
r = backend._lib.i2d_GENERAL_NAMES(general_names, pp)