diff --git a/Modules/_ssl.c b/Modules/_ssl.c
index 994198cae81..ead5b0ef759 100644
--- a/Modules/_ssl.c
+++ b/Modules/_ssl.c
@@ -2224,7 +2224,9 @@ _ssl__SSLContext_impl(PyTypeObject *type, int proto_version)
     PySSLContext *self;
     long options;
     SSL_CTX *ctx = NULL;
+#if defined(SSL_MODE_RELEASE_BUFFERS)
     unsigned long libver;
+#endif
 
     PySSL_BEGIN_ALLOW_THREADS
     if (proto_version == PY_SSL_VERSION_TLS1)