diff --git a/libratbox/src/openssl.c b/libratbox/src/openssl.c
index bac3ea1e..bd9df628 100644
--- a/libratbox/src/openssl.c
+++ b/libratbox/src/openssl.c
@@ -321,8 +321,7 @@ rb_init_ssl(void)
 #endif
 			);
 	SSL_CTX_set_verify(ssl_server_ctx, SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE, verify_accept_all_cb);
-	SSL_CTX_set_session_id_context(ssl_server_ctx,
-			(const unsigned char *)"libratbox", 9);
+	SSL_CTX_set_session_cache_mode(ssl_server_ctx, SSL_SESS_CACHE_OFF);
 	SSL_CTX_set_cipher_list(ssl_server_ctx, "EECDH+HIGH:EDH+HIGH:HIGH:!aNULL");
 
 	/* Set ECDHE on OpenSSL 1.00+, but make sure it's actually available because redhat are dicks